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NAME

       xterm - terminal emulator for X

SYNOPSIS

       xterm [-toolkitoption ...] [-option ...] [shell]

DESCRIPTION

       The  xterm  program  is  a  terminal  emulator  for  the X Window System.  It provides DEC
       VT102/VT220 and selected features from higher-level terminals  such  as  VT320/VT420/VT520
       (VTxxx).   It  also  provides  Tektronix  4014  emulation for programs that cannot use the
       window system directly.  If the underlying operating  system  supports  terminal  resizing
       capabilities (for example, the SIGWINCH signal in systems derived from 4.3BSD), xterm will
       use the facilities to notify programs running in the window whenever it is resized.

       The VTxxx and Tektronix 4014 terminals each have their own window so  that  you  can  edit
       text  in  one and look at graphics in the other at the same time.  To maintain the correct
       aspect ratio (height/width), Tektronix graphics will be restricted to the largest box with
       a  4014's aspect ratio that will fit in the window.  This box is located in the upper left
       area of the window.

       Although both windows may be displayed at the same time, one of  them  is  considered  the
       “active” window for receiving keyboard input and terminal output.  This is the window that
       contains the text cursor.  The active window can be chosen through escape  sequences,  the
       “VT Options” menu in the VTxxx window, and the “Tek Options” menu in the 4014 window.

EMULATIONS

       The  VT102  emulation  is  fairly  complete, but does not support autorepeat.  Double-size
       characters are displayed properly if your font server supports scalable fonts.  The  VT220
       emulation does not support soft fonts, it is otherwise complete.

       Terminal database (terminfo (5) or termcap (5)) entries that work with xterm include

              an optional platform-specific entry (“xterm”),
              “xterm”,
              “vt102”,
              “vt100”,
              “ansi” and
              “dumb”

       Xterm  automatically  searches  the  terminal database in this order for these entries and
       then sets the “TERM” and the “TERMCAP” environment variables.  You may also  use  “vt220”,
       but  must  set  the  terminal  emulation  level  with the decTerminalID resource.  On most
       systems, xterm will use the terminfo database.  Some  older  systems  use  termcap.   (The
       “TERMCAP”  environment  variable is not set if xterm is linked against a terminfo library,
       since the requisite information is not provided  by  the  termcap  emulation  of  terminfo
       libraries).

       Many  of the special xterm features may be modified under program control through a set of
       escape sequences different from the standard  VT102  escape  sequences.   (See  the  Xterm
       Control Sequences document.)

       The Tektronix 4014 emulation is also fairly good.  It supports 12-bit graphics addressing,
       scaled to the window size.  Four different font sizes and five different lines  types  are
       supported.   There  is no write-through or defocused mode support.  The Tektronix text and
       graphics commands are recorded internally by xterm and may be written to a file by sending
       the COPY escape sequence (or through the Tektronix menu; see below).  The name of the file
       will be “COPYyyyy-MM-dd.hh:mm:ss”, where yyyy, MM, dd, hh, mm and ss are the year,  month,
       day,  hour,  minute  and  second  when  the COPY was performed (the file is created in the
       directory xterm is started in, or the home directory for a login xterm).

       Not all of the features described in this manual are necessarily available in this version
       of  xterm.  Some (e.g., the non-VT220 extensions) are available only if they were compiled
       in, though the most commonly-used are in the default configuration.

OTHER FEATURES

       Xterm automatically highlights  the  text  cursor  when  the  pointer  enters  the  window
       (selected)  and  unhighlights  it when the pointer leaves the window (unselected).  If the
       window is the focus window, then the text  cursor  is  highlighted  no  matter  where  the
       pointer is.

       In  VT102  mode, there are escape sequences to activate and deactivate an alternate screen
       buffer, which is the same size as the display area of the  window.   When  activated,  the
       current  screen is saved and replaced with the alternate screen.  Saving of lines scrolled
       off the top of the window is disabled until the normal  screen  is  restored.   The  usual
       terminal  description  for xterm allows the visual editor vi(1) to switch to the alternate
       screen for editing and to restore the screen on exit.  A popup menu entry makes it  simple
       to switch between the normal and alternate screens for cut and paste.

       In  either  VT102  or Tektronix mode, there are escape sequences to change the name of the
       windows.  Additionally, in VT102 mode, xterm implements  the  window-manipulation  control
       sequences from dtterm, such as resizing the window, setting its location on the screen.

       Xterm  allows character-based applications to receive mouse events (currently button-press
       and release events, and button-motion events) as keyboard control  sequences.   See  Xterm
       Control Sequences for details.

OPTIONS

       The xterm terminal emulator accepts the standard X Toolkit command line options as well as
       many application-specific options.  If the option begins with a `+' instead of a `-',  the
       option is restored to its default value.

       -version
               This causes xterm to print a version number to the standard output, and then exit.

       -help   This  causes  xterm to print out a verbose message describing its options, one per
               line.  The message is written to the standard output.  After printing the message,
               xterm  exits.   Xterm  generates  this  message,  sorting  it and noting whether a
               “-option” or a “+option”  turns  the  feature  on  or  off,  since  some  features
               historically  have  been one or the other.  Xterm generates a concise help message
               (multiple options per line) when an unknown option is used, e.g.,

                   xterm -z

               If the logic for a particular option such as logging is not compiled  into  xterm,
               the help text for that option also is not displayed by the -help option.

       Most  of  the  xterm  options  are  actually  parsed by the X Toolkit, which sets resource
       values.  Xterm provides the X Toolkit with a table of options.  A few of these are marked,
       telling  the X Toolkit to ignore them (-help, -version, -class, -e, and -into).  After the
       X Toolkit has parsed the command-line parameters,  it  removes  those  which  it  handles,
       leaving the specially-marked parameters for xterm to handle.

       The  -version and -help options are interpreted even if xterm cannot open the display, and
       are useful for testing and configuration scripts.  Along with  -class,  they  are  checked
       before other options.  To do this, xterm has its own (much simpler) argument parser, along
       with a table of the X Toolkit's built-in list of options.

       Relying upon the X Toolkit to parse the options and associated values has  the  advantages
       of  simplicity  and  good  integration  with  the  X  resource mechanism.  There are a few
       drawbacks

       ·   Xterm cannot tell easily whether a resource value was  set  by  one  of  the  external
           resource-  or  application-defaults files, or if it was set through the -xrm option or
           via some directly relevant command-line option.  Xterm sees  only  the  end-result:  a
           value supplied when creating its widgets.

       ·   Xterm  does not know the order in which particular options and items in resource files
           are evaluated.  Rather, it sees all of the values for a given widget at the same time.
           In the design of these options, some are deemed more important, and can override other
           options.

           The X Toolkit uses patterns (constants and wildcards)  to  match  resources.   Once  a
           particular pattern has been used, it will not modify it.  To override a given setting,
           a more-specific pattern must be used, e.g., replacing  “*”  with  “.”.   Some  poorly-
           designed  resource  files are too specific to allow the command-line options to affect
           the relevant widget values.

       ·   In a few cases, the X Toolkit combines its standard options in ways which do not  work
           well  with  xterm.   This  happens with the color (-fg, -B) and reverse (-rv) options.
           Xterm makes a special case of these and adjusts its sense of “reverse” to lessen  user
           surprise.

       One parameter (after all options) may be given.  That overrides xterm's built-in choice of
       shell program:

       ·   If the parameter is not a relative path, i.e., beginning with  “./”  or  “../”,  xterm
           looks  for  the  file  in  the user's PATH.  In either case, this check fails if xterm
           cannot construct an absolute path.

       ·   If that check fails (or if no such parameter is given), xterm next checks the  “SHELL”
           variable.   If  that  specifies  an executable file, xterm will attempt to start that.
           However, xterm additionally checks if it is a valid shell, and will unset  “SHELL”  if
           it is not.

       ·   If  “SHELL”  is  not  set  to an executable file, xterm tries to use the shell program
           specified in the user's password file entry.  As before, xterm verifies if this  is  a
           valid shell.

       ·   Finally,  if  the  password  file  entry  does  not  specify a valid shell, xterm uses
           /bin/sh.

       The -e option cannot be used with this parameter since it uses  all  parameters  following
       the option.

       Xterm validates shell programs by finding their pathname in the text file /etc/shells.  It
       treats the environment variable “SHELL” specially because (like “TERM”), xterm both  reads
       and  updates  the  variable, and because the program started by xterm is not necessarily a
       shell.

       The other options are used to control the appearance and behavior.  Not  all  options  are
       necessarily configured into your copy of xterm:

       -132    Normally,  the  VT102  DECCOLM  escape  sequence  that switches between 80 and 132
               column mode is ignored.  This option causes the  DECCOLM  escape  sequence  to  be
               recognized, and the xterm window will resize appropriately.

       -ah     This  option  indicates  that  xterm  should always highlight the text cursor.  By
               default, xterm will display a hollow text cursor whenever the focus is lost or the
               pointer leaves the window.

       +ah     This  option  indicates  that  xterm  should  do text cursor highlighting based on
               focus.

       -ai     This option disables active icon support if that feature was compiled into  xterm.
               This is equivalent to setting the vt100 resource activeIcon to “false”.

       +ai     This  option  enables active icon support if that feature was compiled into xterm.
               This is equivalent to setting the vt100 resource activeIcon to “true”.

       -aw     This option indicates that auto-wraparound should be  allowed.   This  allows  the
               cursor  to  automatically wrap to the beginning of the next line when it is at the
               rightmost position of a line and text is output.

       +aw     This option indicates that auto-wraparound should not be allowed.

       -b number
               This option specifies the size of the inner border (the distance between the outer
               edge  of  the  characters  and  the  window  border) in pixels.  That is the vt100
               internalBorder resource.  The default is “2”.

       +bc     turn off text cursor blinking.  This overrides the cursorBlink resource.

       -bc     turn on text cursor blinking.  This overrides the cursorBlink resource.

       -bcf milliseconds
               set the amount of time text cursor is off  when  blinking  via  the  cursorOffTime
               resource.

       -bcn milliseconds
               set  the  amount  of  time  text  cursor  is on when blinking via the cursorOnTime
               resource.

       -bdc    Set the vt100 resource colorBDMode to “false”, disabling the display of characters
               with bold attribute as color.

       +bdc    Set  the  vt100 resource colorBDMode to “true”, enabling the display of characters
               with bold attribute as color rather than bold.

       -cb     Set the vt100 resource cutToBeginningOfLine to “false”.

       +cb     Set the vt100 resource cutToBeginningOfLine to “true”.

       -cc characterclassrange:value[,...]
               This sets classes indicated by the given ranges for using in selecting  by  words.
               See  the  section  specifying  character  classes  and discussion of the charClass
               resource.

       -cjk_width
               Set the cjkWidth resource to “true”.  When turned on, characters with  East  Asian
               Ambiguous (A) category in UTR 11 have a column width of 2.  Otherwise, they have a
               column width of 1.  This may be useful for some  legacy  CJK  text  terminal-based
               programs  assuming  box  drawings and others to have a column width of 2.  It also
               should  be  turned  on  when  you  specify  a  TrueType  CJK   double-width   (bi-
               width/monospace)  font  either  with -fa at the command line or faceName resource.
               The default is “false”

       +cjk_width
               Reset the cjkWidth resource.

       -class string
               This option allows you  to  override  xterm's  resource  class.   Normally  it  is
               “XTerm”,  but  can  be  set to another class such as “UXTerm” to override selected
               resources.

       -cm     This option disables recognition of ANSI color-change escape sequences.   It  sets
               the colorMode resource to “false”.

       +cm     This  option  enables  recognition of ANSI color-change escape sequences.  This is
               the same as the vt100 resource colorMode.

       -cn     This option indicates that newlines should not be cut in line-mode selections.  It
               sets the cutNewline resource to “false”.

       +cn     This  option  indicates  that  newlines should be cut in line-mode selections.  It
               sets the cutNewline resource to “true”.

       -cr color
               This option specifies the color to use for text cursor.  The default is to use the
               same  foreground  color  that  is used for text.  It sets the cursorColor resource
               according to the parameter.

       -cu     This option indicates that xterm should work around a bug in the  more(1)  program
               that  causes  it  to  incorrectly  display lines that are exactly the width of the
               window and are followed by a line beginning with a tab (the leading tabs  are  not
               displayed).  This option is so named because it was originally thought to be a bug
               in the curses(3x) cursor motion package.

       +cu     This option indicates that xterm should not work around the more(1) bug  mentioned
               above.

       -dc     This  option  disables  the  escape  sequence  to change dynamic colors: the vt100
               foreground and background colors,  its  text  cursor  color,  the  pointer  cursor
               foreground and background colors, the Tektronix emulator foreground and background
               colors,  its  text  cursor  color  and  highlight  color.   The  option  sets  the
               dynamicColors option to “false”.

       +dc     This option enables the escape sequence to change dynamic colors.  The option sets
               the dynamicColors option to “true”.

       -e program [ arguments ... ]
               This option specifies the program (and its command line arguments) to  be  run  in
               the  xterm window.  It also sets the window title and icon name to be the basename
               of the program being executed if neither -T nor -n are given on the command  line.
               This must be the last option on the command line.

       -en encoding
               This  option  determines  the  encoding  on  which xterm runs.  It sets the locale
               resource.  Encodings other than UTF-8 are supported by using luit.  The -lc option
               should be used instead of -en for systems with locale support.

       -fb font
               This  option  specifies  a font to be used when displaying bold text.  It sets the
               boldFont resource.

               This font must be the same height and width as the normal font,  otherwise  it  is
               ignored.  If only one of the normal or bold fonts is specified, it will be used as
               the normal font and the bold font will be produced by overstriking this font.

               See also the discussion of boldMode and alwaysBoldMode resources.

       -fa pattern
               This option sets the pattern for fonts  selected  from  the  FreeType  library  if
               support  for  that  library  was  compiled  into  xterm.   This corresponds to the
               faceName resource.  When a CJK double-width font is specified, you  also  need  to
               turn on the cjkWidth resource.

               See  also  the  renderFont resource, which combines with this to determine whether
               FreeType fonts are initially active.

       -fbb    This option indicates that xterm should compare normal  and  bold  fonts  bounding
               boxes to ensure they are compatible.  It sets the freeBoldBox resource to “false”.

       +fbb    This option indicates that xterm should not compare normal and bold fonts bounding
               boxes to ensure they are compatible.  It sets the freeBoldBox resource to “true”.

       -fbx    This option indicates that xterm should not assume that the normal and bold  fonts
               have  VT100  line-drawing  characters.   If  any  are missing, xterm will draw the
               characters directly.  It sets the forceBoxChars resource to “false”.

       +fbx    This option indicates that xterm should assume that the normal and bold fonts have
               VT100 line-drawing characters.  It sets the forceBoxChars resource to “true”.

       -fd pattern
               This  option  sets  the  pattern for double-width fonts selected from the FreeType
               library if support for that library was compiled into xterm.  This corresponds  to
               the faceNameDoublesize resource.

       -fi font
               This  option  sets  the  font  for  active icons if that feature was compiled into
               xterm.

               See also the discussion of the iconFont resource.

       -fs size
               This option sets the pointsize for fonts selected from  the  FreeType  library  if
               support  for  that  library  was  compiled  into  xterm.   This corresponds to the
               faceSize resource.

       -fullscreen
               This option indicates that xterm should ask the window manager to let it  use  the
               full-screen for display, e.g., without window decorations.  It sets the fullscreen
               resource to “true”.

       +fullscreen
               This option indicates that xterm should not ask the window manager to let  it  use
               the full-screen for display.  It sets the fullscreen resource to “false”.

       -fw font
               This  option  specifies the font to be used for displaying wide text.  By default,
               it will attempt to use a font twice as wide as the font that will be used to  draw
               normal  text.   If no double-width font is found, it will improvise, by stretching
               the normal font.  This corresponds to the wideFont resource.

       -fwb font
               This option specifies the font to be used  for  displaying  bold  wide  text.   By
               default, it will attempt to use a font twice as wide as the font that will be used
               to draw bold text.  If no double-width  font  is  found,  it  will  improvise,  by
               stretching the bold font.  This corresponds to the wideBoldFont resource.

       -fx font
               This option specifies the font to be used for displaying the preedit string in the
               “OverTheSpot” input method.

               See also the discussion of the ximFont resource.

       -hc color
               (see -selbg).

       -hf     This option indicates that HP Function Key escape codes should  be  generated  for
               function keys.  It sets the hpFunctionKeys resource to “true”.

       +hf     This  option  indicates  that HP Function Key escape codes should not be generated
               for function keys.  It sets the hpFunctionKeys resource to “false”.

       -hm     Tells xterm to use highlightTextColor and highlightColor to override the  reversed
               foreground/background  colors  in  a  selection.   It  sets the highlightColorMode
               resource to “true”.

       +hm     Tells xterm not to use  highlightTextColor  and  highlightColor  to  override  the
               reversed   foreground/background   colors   in   a   selection.    It   sets   the
               highlightColorMode resource to “false”.

       -hold   Turn on the hold resource, i.e., xterm will not  immediately  destroy  its  window
               when  the  shell command completes.  It will wait until you use the window manager
               to destroy/kill the window, or if you use the menu entries  that  send  a  signal,
               e.g., HUP or KILL.

       +hold   Turn  off  the hold resource, i.e., xterm will immediately destroy its window when
               the shell command completes.

       -ie     Turn on the ptyInitialErase resource, i.e., use the pseudo-terminal's sense of the
               stty erase value.

       +ie     Turn off the ptyInitialErase resource, i.e., set the stty erase value using the kb
               string from the termcap entry as a reference, if available.

       -im     Turn on the useInsertMode resource, which forces use  of  insert  mode  by  adding
               appropriate  entries to the TERMCAP environment variable.  (This option is ignored
               on most systems, because TERMCAP is not used).

       +im     Turn off the useInsertMode resource.

       -into windowId
               Given an X window identifier (an integer,  which  can  be  hexadecimal,  octal  or
               decimal  according  to  whether  it  begins with "0x", "0" or neither), xterm will
               reparent its top-level shell widget to that window.  This is used to  embed  xterm
               within other applications.

               For  instance,  there  are  scripts  for  Tcl/Tk  and  Gtk  which  can  be used to
               demonstrate the feature.  When using Gtk, there is a limitation  of  that  toolkit
               which requires that xterm's allowSendEvents resource is enabled.

       -itc    Set the vt100 resource colorITMode to “false”, disabling the display of characters
               with italic attribute as color.

       +itc    Set the vt100 resource colorITMode to “true”, enabling the display  of  characters
               with italic attribute as color rather than italic.

       -j      This  option indicates that xterm should do jump scrolling.  It corresponds to the
               jumpScroll resource.  Normally, text is scrolled one line at a time;  this  option
               allows  xterm  to  move  multiple  lines at a time so that it does not fall as far
               behind.  Its use is strongly recommended since it makes  xterm  much  faster  when
               scanning  through  large amounts of text.  The VT100 escape sequences for enabling
               and disabling smooth scroll as well as the “VT Options” menu can be used  to  turn
               this feature on or off.

       +j      This option indicates that xterm should not do jump scrolling.

       -k8     This  option  sets  the  allowC1Printable resource.  When allowC1Printable is set,
               xterm overrides the mapping of C1 control characters (code 128-159) to treat  them
               as printable.

       +k8     This option resets the allowC1Printable resource.

       -kt keyboardtype
               This  option  sets the keyboardType resource.  Possible values include: “unknown”,
               “default”, “hp”, “sco”, “sun”, “tcap” and “vt220”.

               The value “unknown”, causes the corresponding resource to be ignored.

               The  value  “default”,  suppresses  the   associated   resources   hpFunctionKeys,
               scoFunctionKeys,  sunFunctionKeys,  tcapFunctionKeys  and  sunKeyboard,  using the
               Sun/PC keyboard layout.

       -l      Turn logging on.  Normally logging is not supported,  due  to  security  concerns.
               Some  versions  of  xterm may have logging enabled.  The logfile is written to the
               directory from which xterm is invoked.  The filename is generated, of the form

                    XtermLog.XXXXXX

               or

                    Xterm.log.hostname.yyyy.mm.dd.hh.mm.ss.XXXXXX

               depending on how xterm was built.

       +l      Turn logging off.

       -lc     Turn on support of various encodings according to the users' locale setting, i.e.,
               LC_ALL,  LC_CTYPE,  or LANG environment variables.  This is achieved by turning on
               UTF-8 mode and by invoking luit for conversion between locale encodings and UTF-8.
               (luit is not invoked in UTF-8 locales.)  This corresponds to the locale resource.

               The  actual  list of encodings which are supported is determined by luit.  Consult
               the luit manual page for further details.

               See also the discussion of the -u8 option which supports UTF-8 locales.

       +lc     Turn off support of automatic selection of locale  encodings.   Conventional  8bit
               mode or, in UTF-8 locales or with -u8 option, UTF-8 mode will be used.

       -lcc path
               File  name  for the encoding converter from/to locale encodings and UTF-8 which is
               used with -lc option or locale resource.  This  corresponds  to  the  localeFilter
               resource.

       -leftbar
               Force scrollbar to the left side of VT100 screen.  This is the default, unless you
               have set the rightScrollBar resource.

       -lf filename
               Specify the log-filename.  See the -l option.

       -ls     This option indicates that the shell that is started in the xterm window will be a
               login  shell  (i.e.,  the first character of argv[0] will be a dash, indicating to
               the shell that it should read the user's .login or .profile).

               The -ls flag and the loginShell resource are ignored if -e is also given,  because
               xterm  does  not know how to make the shell start the given command after whatever
               it does when it is a login shell - the user's shell of choice need not be a Bourne
               shell after all.  Also, xterm -e is supposed to provide a consistent functionality
               for other applications that need to start text-mode programs in a window,  and  if
               loginShell were not ignored, the result of ~/.profile might interfere with that.

               If  you  do  want  the  effect of -ls and -e simultaneously, you may get away with
               something like

                   xterm -e /bin/bash -l -c "my command here"

               Finally, -ls  is  not  completely  ignored,  because  xterm -ls -e  does  write  a
               /var/log/wtmp entry (if configured to do so), whereas xterm -e does not.

       -maximized
               This  option  indicates  that  xterm should ask the window manager to maximize its
               layout on startup.  This corresponds to the maximized resource.

               Maximizing is not the reverse of iconifying;  it  is  possible  to  do  both  with
               certain window managers.

       +maximized
               This option indicates that xterm should ask the window manager to not maximize its
               layout on startup.

       +ls     This option indicates that the shell that is started should not be a  login  shell
               (i.e., it will be a normal “subshell”).

       -mb     This  option  indicates  that  xterm should ring a margin bell when the user types
               near the right end of a line.

       +mb     This option indicates that margin bell should not be rung.

       -mc milliseconds
               This option specifies the maximum time between multi-click selections.

       -mesg   Turn off the messages resource, i.e., disallow write access to the terminal.

       +mesg   Turn on the messages resource, i.e., allow write access to the terminal.

       -mk_width
               Set the mkWidth resource to “true”.  This makes xterm use a  built-in  version  of
               the wide-character width calculation.  The default is “false”

       +mk_width
               Reset the mkWidth resource.

       -ms color
               This option specifies the color to be used for the pointer cursor.  The default is
               to use the foreground color.  This sets the pointerColor resource.

       -nb number
               This option specifies the number of characters from the right end  of  a  line  at
               which the margin bell, if enabled, will ring.  The default is “10”.

       -nul    This option disables the display of underlining.

       +nul    This option enables the display of underlining.

       -pc     This option enables the PC-style use of bold colors (see boldColors resource).

       +pc     This option disables the PC-style use of bold colors.

       -pob    This  option  indicates  that  the window should be raised whenever a Control-G is
               received.

       +pob    This option indicates that the window should not be raised whenever a Control-G is
               received.

       -report-colors
               Print  a  report  to the standard output showing information about colors as xterm
               allocates them.  This corresponds to the reportColors resource.

       -report-fonts
               Print a report to the standard output showing information about  fonts  which  are
               loaded.  This corresponds to the reportFonts resource.

       -rightbar
               Force scrollbar to the right side of VT100 screen.

       -rvc    This option disables the display of characters with reverse attribute as color.

       +rvc    This option enables the display of characters with reverse attribute as color.

       -rw     This  option indicates that reverse-wraparound should be allowed.  This allows the
               cursor to back up from the leftmost column of one line to the rightmost column  of
               the  previous  line.  This is very useful for editing long shell command lines and
               is encouraged.  This option can be turned on and off from the “VT Options” menu.

       +rw     This option indicates that reverse-wraparound should not be allowed.

       -s      This option indicates that xterm  may  scroll  asynchronously,  meaning  that  the
               screen  does  not  have  to  be  kept completely up to date while scrolling.  This
               allows xterm to run faster when network latencies are very high and  is  typically
               useful when running across a very large internet or many gateways.

       +s      This option indicates that xterm should scroll synchronously.

       -samename
               Does  not  send title and icon name change requests when the request would have no
               effect: the name is not changed.  This has the advantage of preventing flicker and
               the  disadvantage  of  requiring an extra round trip to the server to find out the
               previous value.  In practice this should never be a problem.

       +samename
               Always send title and icon name change requests.

       -sb     This option indicates that some number of lines that are scrolled off the  top  of
               the  window should be saved and that a scrollbar should be displayed so that those
               lines can be viewed.  This option may be turned on and off from the  “VT  Options”
               menu.

       +sb     This option indicates that a scrollbar should not be displayed.

       -selbg color
               This  option  specifies  the color to use for the background of selected text.  If
               not specified, reverse video is used.  See the discussion  of  the  highlightColor
               resource.

       -selfg color
               This  option  specifies  the  color  to  use for selected text.  If not specified,
               reverse video is used.  See the discussion of the highlightTextColor resource.

       -sf     This option indicates that Sun Function Key escape codes should be  generated  for
               function keys.

       +sf     This  option  indicates  that  the  standard  escape codes should be generated for
               function keys.

       -sh number
               scale line-height  values  by  the  given  number.   See  the  discussion  of  the
               scaleHeight resource.

       -si     This  option indicates that output to a window should not automatically reposition
               the screen to the bottom of the scrolling region.  This option can  be  turned  on
               and off from the “VT Options” menu.

       +si     This  option  indicates  that  output to a window should cause it to scroll to the
               bottom.

       -sk     This option indicates that pressing a key while  using  the  scrollbar  to  review
               previous lines of text should cause the window to be repositioned automatically in
               the normal position at the bottom of the scroll region.

       +sk     This option indicates that pressing a key while using  the  scrollbar  should  not
               cause the window to be repositioned.

       -sl number
               This  option specifies the number of lines to save that have been scrolled off the
               top of the screen.  This corresponds to the saveLines resource.   The  default  is
               “64”.

       -sm     This option, corresponding to the sessionMgt resource, indicates that xterm should
               set up session manager callbacks.

       +sm     This option indicates that xterm should not set up session manager callbacks.

       -sp     This option indicates that Sun/PC keyboard should be  assumed,  providing  mapping
               for keypad “+” to “,”, and CTRL-F1 to F13, CTRL-F2 to F14, etc.

       +sp     This  option  indicates  that  the  standard  escape codes should be generated for
               keypad and function keys.

       -t      This option indicates that xterm should start in Tektronix mode,  rather  than  in
               VT102 mode.  Switching between the two windows is done using the “Options” menus.

               Terminal database (terminfo (5) or termcap (5)) entries that work with xterm are:

               “tek4014”,
               “tek4015”,
               “tek4012”,
               “tek4013”,
               “tek4010”, and
               “dumb”.

               xterm automatically searches the terminal database in this order for these entries
               and then sets the “TERM” and the “TERMCAP” environment variables.

       +t      This option indicates that xterm should start in VT102 mode.

       -tb     This option, corresponding to the toolBar resource, indicates  that  xterm  should
               display  a  toolbar  (or  menubar)  at  the top of its window.  The buttons in the
               toolbar  correspond  to  the  popup  menus,  e.g.,  control/left/mouse  for  “Main
               Options”.

       +tb     This option indicates that xterm should not set up a toolbar.

       -ti term_id
               Specify  the  name  used  by  xterm  to select the correct response to terminal ID
               queries.  It also specifies the emulation level, used to  determine  the  type  of
               response  to  a  DA  control  sequence.   Valid values include vt52, vt100, vt101,
               vt102, vt220, and vt240 (the “vt” is optional).   The  default  is  “vt420”.   The
               term_id  argument  specifies  the  terminal  ID  to use.  (This is the same as the
               decTerminalID resource).

       -tm string
               This option specifies a series  of  terminal  setting  keywords  followed  by  the
               characters  that  should be bound to those functions, similar to the stty program.
               The keywords and their values are described in detail in the ttyModes resource.

       -tn name
               This option specifies the name of  the  terminal  type  to  be  set  in  the  TERM
               environment  variable.   It  corresponds  to the termName resource.  This terminal
               type must exist in the terminal database (termcap or terminfo,  depending  on  how
               xterm  is built) and should have li# and co# entries.  If the terminal type is not
               found, xterm uses the built-in list “xterm”, “vt102”, etc.

       -u8     This option sets the utf8 resource.  When utf8 is set, xterm  interprets  incoming
               data  as  UTF-8.  This sets the wideChars resource as a side-effect, but the UTF-8
               mode set by this option prevents it from being turned off.  If you must turn UTF-8
               encoding  on  and off, use the -wc option or the corresponding wideChars resource,
               rather than the -u8 option.

               This option and the utf8 resource are overridden by the -lc and  -en  options  and
               locale  resource.   That  is,  if xterm has been compiled to support luit, and the
               locale resource is not “false” this option is ignored.  We recommend using the -lc
               option  or the “locale: true” resource in UTF-8 locales when your operating system
               supports locale, or -en UTF-8 option or the  “locale: UTF-8”  resource  when  your
               operating system does not support locale.

       +u8     This option resets the utf8 resource.

       -uc     This option makes the cursor underlined instead of a box.

       +uc     This option makes the cursor a box instead of underlined.

       -ulc    This  option  disables the display of characters with underline attribute as color
               rather than with underlining.

       +ulc    This option enables the display of characters with underline  attribute  as  color
               rather than with underlining.

       -ulit   This  option,  corresponding to the italicULMode resource, disables the display of
               characters with underline attribute as italics rather than with underlining.

       +ulit   This option, corresponding to the italicULMode resource, enables  the  display  of
               characters with underline attribute as italics rather than with underlining.

       -ut     This  option  indicates  that  xterm should not write a record into the the system
               utmp log file.

       +ut     This option indicates that xterm should write a record into the  system  utmp  log
               file.

       -vb     This  option  indicates  that  a  visual  bell  is  preferred over an audible one.
               Instead of ringing the terminal bell whenever a Control-G is received, the  window
               will be flashed.

       +vb     This option indicates that a visual bell should not be used.

       -wc     This option sets the wideChars resource.

               When  wideChars is set, xterm maintains internal structures for 16-bit characters.
               If xterm is not started in UTF-8 mode (or if this resource is not set),  initially
               it  maintains  those  structures  to support 8-bit characters.  Xterm can later be
               switched, using a menu entry or control sequence, causing it to  reallocate  those
               structures to support 16-bit characters.

               The default is “false”.

       +wc     This option resets the wideChars resource.

       -wf     This option indicates that xterm should wait for the window to be mapped the first
               time before starting the subprocess so that the initial terminal size settings and
               environment  variables  are  correct.   It  is the application's responsibility to
               catch subsequent terminal size changes.

       +wf     This option indicates that xterm should not wait before starting the subprocess.

       -ziconbeep percent
               Same as zIconBeep resource.  If percent is non-zero, xterms  that  produce  output
               while  iconified  will  cause  an  XBell  sound at the given volume and have “***”
               prepended to their icon titles.  Most window  managers  will  detect  this  change
               immediately,  showing  you which window has the output.  (A similar feature was in
               x10 xterm.)

       -C      This option indicates that this window should receive console output.  This is not
               supported  on all systems.  To obtain console output, you must be the owner of the
               console device, and you must have read and write permission for it.   If  you  are
               running X under xdm on the console screen you may need to have the session startup
               and reset programs explicitly change the ownership of the console device in  order
               to get this option to work.

       -Sccn   This option allows xterm to be used as an input and output channel for an existing
               program and is sometimes used  in  specialized  applications.   The  option  value
               specifies  the  last  few letters of the name of a pseudo-terminal to use in slave
               mode, plus the number of the inherited file descriptor.  If the option contains  a
               “/” character, that delimits the characters used for the pseudo-terminal name from
               the file descriptor.  Otherwise, exactly two characters are used from  the  option
               for the pseudo-terminal name, the remainder is the file descriptor.  Examples (the
               first two are equivalent since the descriptor follows the last “/”):

                   -S/dev/pts/123/45
                   -S123/45
                   -Sab34

               Note that xterm does not close any file descriptor which it did not open  for  its
               own  use.   It  is  possible (though probably not portable) to have an application
               which passes an open file descriptor down to xterm past the initialization or  the
               -S option to a process running in the xterm.

   Old Options
       The  following  command line arguments are provided for compatibility with older versions.
       They may not be supported in the next release as the X Toolkit provides  standard  options
       that accomplish the same task.

       %geom   This option specifies the preferred size and position of the Tektronix window.  It
               is shorthand for specifying the “*tekGeometry” resource.

       #geom   This option specifies the preferred position of the icon window.  It is  shorthand
               for specifying the “*iconGeometry” resource.

       -T string
               This option specifies the title for xterm's windows.  It is equivalent to -title.

       -n string
               This  option  specifies  the  icon  name for xterm's windows.  It is shorthand for
               specifying the “*iconName” resource.  Note that  this  is  not  the  same  as  the
               toolkit option -name (see below).  The default icon name is the application name.

               If no suitable icon is found, xterm provides a compiled-in pixmap.

       -r      This  option  indicates  that  reverse  video  should be simulated by swapping the
               foreground and background colors.  It is equivalent to -rv.

       -w number
               This option specifies the width in pixels of the border  surrounding  the  window.
               It is equivalent to -borderwidth or -bw.

   X Toolkit Options
       The following standard X Toolkit command line arguments are commonly used with xterm:

       -bd color
               This  option  specifies  the  color  to  use  for  the  border of the window.  The
               corresponding resource name is borderColor.  Xterm uses  the  X  Toolkit  default,
               which is “XtDefaultForeground”.

       -bg color
               This  option  specifies  the  color  to use for the background of the window.  The
               corresponding resource name is background.  The default is “XtDefaultBackground”.

       -bw number
               This option specifies the width in pixels of the border surrounding the window.

               This appears to be a legacy of older X releases.  It sets the borderWidth resource
               of  the  shell  widget,  and  may provide advice to your window manager to set the
               thickness of the window frame.  Most window managers do not use this  information.
               See the -b option, which controls the inner border of the xterm window.

       -display display
               This option specifies the X server to contact; see X(7).

       -fg color
               This  option  specifies  the  color to use for displaying text.  The corresponding
               resource name is foreground.  The default is “XtDefaultForeground”.

       -fn font
               This option specifies the font  to  be  used  for  displaying  normal  text.   The
               corresponding resource name is font.  The resource value default is fixed.

       -font font
               This is the same as -fn.

       -geometry geometry
               This  option  specifies  the  preferred size and position of the VT102 window; see
               X(7).

               The normal geometry specification can be suffixed with @ followed  by  a  Xinerama
               screen  specification;  it  can be either g for the global screen (default), c for
               the current screen or a screen number.

       -iconic This option indicates that xterm should ask the window manager to start it  as  an
               icon rather than as the normal window.  The corresponding resource name is iconic.

       -name name
               This  option  specifies  the  application  name  under  which  resources are to be
               obtained, rather than the default executable file name.  Name should  not  contain
               “.” or “*” characters.

       -rv     This  option  indicates  that  reverse  video  should be simulated by swapping the
               foreground  and  background  colors.    The   corresponding   resource   name   is
               reverseVideo.

       +rv     Disable  the  simulation  of  reverse  video by swapping foreground and background
               colors.

       -title string
               This option specifies the window title string, which may be  displayed  by  window
               managers  if the user so chooses.  The default title is the command line specified
               after the -e option, if any, otherwise the application name.

       -xrm resourcestring
               This option specifies a resource string to be used.  This is especially useful for
               setting resources that do not have separate command line options.

RESOURCES

       The program understands all of the core X Toolkit resource names and classes.  Application
       specific resources (e.g., “XTerm.NAME”) follow:

   Application Resources
       backarrowKeyIsErase (class BackarrowKeyIsErase)
               Tie the VTxxx backarrowKey and ptyInitialErase resources together by  setting  the
               DECBKM  state  according to whether the initial erase character is a backspace (8)
               or delete (127) character.  A “false” value disables this feature.  The default is
               “True”.

               Here are tables showing how the initial settings for

               ·   backarrowKeyIsErase (BKIE),

               ·   backarrowKey (BK), and

               ·   ptyInitialErase (PIE), along with the

               ·   stty erase character (^H for backspace, ^? for delete)

               will affect DECBKM.  First, xterm obtains the initial erase character:

               ·   xterm's internal value is ^H

               ·   xterm asks the operating system for the value which stty shows

               ·   the ttyModes resource may override erase

               ·   if ptyInitialErase is false, xterm will look in the terminal database

               Summarizing that as a table:

               PIE     stty   termcap   erase
               ───────────────────────────────
               false    ^H      ^H       ^H
               false    ^H      ^?       ^?
               false    ^?      ^H       ^H
               false    ^?      ^?       ^?
               true     ^H      ^H       ^H
               true     ^H      ^?       ^H
               true     ^?      ^H       ^?
               true     ^?      ^?       ^?

               Using that erase character, xterm allows further choices:

               ·   if backarrowKeyIsErase is true, xterm uses the erase character for the initial
                   state of DECBKM

               ·   if backarrowKeyIsErase is false, xterm sets DECBKM to 2 (internal).  This ties
                   together backarrowKey and the control sequence for DECBKM

               ·   applications can send a control sequence to set/reset DECBKM control set

               ·   the “Backarrow Key (BS/DEL)” menu entry toggles DECBKM

               Summarizing the initialization details:

               erase   BKIE    BK      DECBKM   result
               ────────────────────────────────────────
                ^?     false   false     2        ^H
                ^?     false   true      2        ^?
                ^?     true    false     0        ^?
                ^?     true    true      1        ^?
                ^H     false   false     2        ^H
                ^H     false   true      2        ^?
                ^H     true    false     0        ^H
                ^H     true    true      1        ^H

       fullscreen (class Fullscreen)
               Specifies  whether  or not xterm should ask the window manager to use a fullscreen
               layout on startup.  Xterm accepts either a keyword (ignoring case) or  the  number
               shown in parentheses:

               false (0)
                  Fullscreen layout is not used initially, but may be later via menu-selection or
                  control sequence.

               true (1)
                  Fullscreen layout is used initially,  but  may  be  disabled  later  via  menu-
                  selection or control sequence.

               always (2)
                  Fullscreen  layout  is  used  initially, and cannot be disabled later via menu-
                  selection or control sequence.

               never (3)
                  Fullscreen layout is not used, and cannot be enabled later  via  menu-selection
                  or control sequence.

               The default is “false”.

       hold (class Hold)
               If  true,  xterm  will  not  immediately destroy its window when the shell command
               completes.  It will wait until you use the  window  manager  to  destroy/kill  the
               window, or if you use the menu entries that send a signal, e.g., HUP or KILL.  You
               may scroll  back,  select  text,  etc.,  to  perform  most  graphical  operations.
               Resizing the display will lose data, however, since this involves interaction with
               the shell which is no longer running.

       hpFunctionKeys (class HpFunctionKeys)
               Specifies whether or not HP Function Key escape  codes  should  be  generated  for
               function keys instead of standard escape sequences.

               See also the keyboardType resource.

       iconGeometry (class IconGeometry)
               Specifies  the  preferred size and position of the application when iconified.  It
               is not necessarily obeyed by all window managers.

       iconHint (class IconHint)
               Specifies an icon which will be added to the window manager hints.  Xterm provides
               no default value.

               Set  this  resource to “none” to omit the hint entirely, using whatever the window
               manager may decide.

               If the iconHint resource is given (or is set via the -n option) xterm searches for
               a   pixmap  file  with  that  name,  in  the  current  directory  as  well  as  in
               /usr/share/pixmaps.  if the resource does not specify an  absolute  pathname.   In
               each  case, xterm adds “_48x48” and/or “.xpm” to the filename after trying without
               those suffixes.  If it is able to load the file, xterm  sets  the  window  manager
               hint  for  the  icon-pixmap.   These  pixmaps  are distributed with xterm, and can
               optionally be compiled-in:

               ·   mini.xterm_16x16, mini.xterm_32x32, mini.xterm_48x48

               ·   filled-xterm_16x16, filled-xterm_32x32, filled-xterm_48x48

               ·   xterm_16x16, xterm_32x32, xterm_48x48

               ·   xterm-color_16x16, xterm-color_32x32, xterm-color_48x48

               In either case, xterm allows for adding a “_48x48” to specify the largest  of  the
               pixmaps as a default.  That is, “mini.xterm” is the same as “mini.xterm_48x48”.

               If  no  explicit  iconHint  resource is given (or if none of the compiled-in names
               matches), xterm uses “mini.xterm” (which is always compiled-in).

               The iconHint resource has no effect on  “desktop”  files,  including  “panel”  and
               “menu”.  Those are typically set via a “.desktop” file; xterm provides samples for
               itself (and the uxterm script).  The more capable desktop systems  allow  changing
               the icon on a per-user basis.

       iconName (class IconName)
               Specifies a label for xterm when iconified.  Xterm provides no default value; some
               window managers may assume the application name, e.g., “xterm”.

               Setting the iconName resource sets the icon label unless overridden  by  zIconBeep
               or the control sequences which change the window and icon labels.

       keyboardType (class KeyboardType)
               Enables  one  (or  none)  of  the various keyboard-type resources: hpFunctionKeys,
               scoFunctionKeys,   sunFunctionKeys,   tcapFunctionKeys   and   sunKeyboard.    The
               resource's  value  should  be one of the corresponding strings “hp”, “sco”, “sun”,
               “tcap” or “vt220”.  The individual resources are provided for legacy support; this
               resource is simpler to use.

               The  default is “unknown”, i.e., none of the associated resources are set via this
               resource.

       maxBufSize (class MaxBufSize)
               Specify the maximum size of the input buffer.  The default is “32768”.  You cannot
               set  this  to  a value less than the minBufSize resource.  It will be increased as
               needed to make that value evenly divide this one.

               On some systems you may want to  increase  one  or  both  of  the  maxBufSize  and
               minBufSize  resource  values to achieve better performance if the operating system
               prefers larger buffer sizes.

       maximized (class Maximized)
               Specifies whether or not xterm should ask  the  window  manager  to  maximize  its
               layout on startup.  The default is “false”.

       messages (class Messages)
               Specifies whether write access to the terminal is allowed initially.  See mesg(1).
               The default is “true”.

       menuLocale (class MenuLocale)
               Specify the locale used for character-set  computations  when  loading  the  popup
               menus.   Use this to improve initialization performance of the Athena popup menus,
               which may load unnecessary (and very large) fonts, e.g., in a locale having  UTF-8
               encoding.  The default is “C” (POSIX).

               To use the current locale (only useful if you have localized the resource settings
               for the menu entries), set the resource to an empty string.

       minBufSize (class MinBufSize)
               Specify the minimum size of the input buffer, i.e., the amount of data that  xterm
               requests  on  each  read.   The default is “4096”.  You cannot set this to a value
               less than 64.

       omitTranslation (class OmitTranslation)
               Selectively omit one or more parts of xterm's  default  translations  at  startup.
               The   resource  value  is  a  comma-separated  list  of  keywords,  which  may  be
               abbreviated: “fullscreen”, “scroll-lock”, “shift-fonts” or  “wheel-mouse”.   Xterm
               also recognizes “default”, but omitting that will make the program unusable unless
               you provide a similar definition in your resource settings.

       ptyHandshake (class PtyHandshake)
               If “true”, xterm will perform handshaking during initialization to ensure that the
               parent and child processes update the utmp and stty state.

               See  also  waitForMap  which  waits for the pseudo-terminal's notion of the screen
               size,  and  ptySttySize  which  resets  the  screen  size  after  other   terminal
               initialization is complete.  The default is “true”.

       ptyInitialErase (class PtyInitialErase)
               If “true”, xterm will use the pseudo-terminal's sense of the stty erase value.  If
               “false”, xterm will set the stty erase value to match its own configuration, using
               the  kb  string  from  the  termcap entry as a reference, if available.  In either
               case, the result is applied to the TERMCAP variable which xterm sets.

               See also the ttyModes resource, which may override this.  The default is “False”.

       ptySttySize (class PtySttySize)
               If “true”, xterm will reset the  screen  size  after  terminal  initialization  is
               complete.  This is needed for some systems whose pseudo-terminals cannot propagate
               terminal characteristics.  Where it is not needed, it  can  interfere  with  other
               methods for setting the intial screen size, e.g., via window manager interaction.

               See  also  waitForMap  which  waits  for  a  handshake-message  giving the pseudo-
               terminal's notion of the screen size.  The default is “false” on Linux  and  OS  X
               systems, “true” otherwise.

       reportFonts (class ReportFonts)
               If  true, xterm will print to the standard output a summary of each font's metrics
               (size, number of glyphs, etc.), as it loads them.  The default is “false”.

       sameName (class SameName)
               If the value of this resource is “true”, xterm does not send title and  icon  name
               change  requests  when  the request would have no effect: the name is not changed.
               This has the advantage of preventing flicker and the disadvantage of requiring  an
               extra  round  trip to the server to find out the previous value.  In practice this
               should never be a problem.  The default is “true”.

       scaleHeight (class ScaleHeight)
               Scale line-height values by the resource value,  which  is  limited  to  “0.9”  to
               “1.5”.  The default value is “1.0”,

               While  this  resource applies to either bitmap or TrueType fonts, its main purpose
               is to help work around incompatible changes in the  Xft  library's  font  metrics.
               Xterm  checks  the  font  metrics to find what the library claims are the bounding
               boxes for each glyph (character).  However, some of Xft's features  (such  as  the
               autohinter)  can cause the glyphs to be scaled larger than the bounding boxes, and
               be partly overwritten by the next row.

               See useClipping for a related resource.

       scoFunctionKeys (class ScoFunctionKeys)
               Specifies whether or not SCO Function Key escape codes  should  be  generated  for
               function keys instead of standard escape sequences.

               See also the keyboardType resource.

       sessionMgt (class SessionMgt)
               If  the  value of this resource is “true”, xterm sets up session manager callbacks
               for XtNdieCallback and XtNsaveCallback.  The default is “true”.

       sunFunctionKeys (class SunFunctionKeys)
               Specifies whether or not Sun Function Key escape codes  should  be  generated  for
               function keys instead of standard escape sequences.

               See also the keyboardType resource.

       sunKeyboard (class SunKeyboard)
               Specifies  whether or not Sun/PC keyboard layout should be assumed rather than DEC
               VT220.  This causes the keypad “+” to be  mapped  to  “,”.   and  CTRL  F1-F10  to
               F11-F20,  depending  on the setting of the ctrlFKeys resource, so xterm emulates a
               DEC VT220 more accurately.   Otherwise  (the  default,  with  sunKeyboard  set  to
               “false”), xterm uses PC-style bindings for the function keys and keypad.

               PC-style  bindings  use  the  Shift,  Alt,  Control and Meta keys as modifiers for
               function-keys and keypad (see the document Xterm Control Sequences  for  details).
               The  PC-style  bindings are analogous to PCTerm, but not the same thing.  Normally
               these bindings do not conflict with the use of the Meta key as described  for  the
               eightBitInput resource.  If they do, note that the PC-style bindings are evaluated
               first.

               See also the keyboardType resource.

       tcapFunctionKeys (class TcapFunctionKeys)
               Specifies whether or not function key escape codes read from the  termcap/terminfo
               entry  should be generated for function keys instead of standard escape sequences.
               The default is “false”, i.e., this feature is disabled.

               See also the keyboardType resource.

       termName (class TermName)
               Specifies the terminal type name to be set in the TERM environment variable.

       title (class Title)
               Specifies a string that may be used by the window  manager  when  displaying  this
               application.

       toolBar (class ToolBar)
               Specifies whether or not the toolbar should be displayed.  The default is “true”.

       ttyModes (class TtyModes)
               Specifies  a  string  containing  terminal  setting keywords and the characters to
               which they may be bound.  Allowable keywords include: brk, dsusp, eof, eol,  eol2,
               erase,  erase2,  flush, intr, kill, lnext, quit, rprnt, start, status, stop, susp,
               swtch and weras.  Control characters may be specified as ^char (e.g.,  ^c  or  ^u)
               and ^? may be used to indicate delete (127).  Use ^- to denote undef.  Use \034 to
               represent ^\, since a  literal  backslash  in  an  X  resource  escapes  the  next
               character.

               This is very useful for overriding the default terminal settings without having to
               do an stty every time an xterm is started.  Note, however, that the  stty  program
               on a given host may use different keywords; xterm's table is built-in.

               If  the  ttyModes  resource  specifies  a  value  for  erase,  that  overrides the
               ptyInitialErase resource setting, i.e., xterm initializes the  terminal  to  match
               that value.

       useInsertMode (class UseInsertMode)
               Force  use of insert mode by adding appropriate entries to the TERMCAP environment
               variable.  This is useful if the system termcap  is  broken.   (This  resource  is
               ignored on most systems, because TERMCAP is not used).  The default is “false”.

       utmpDisplayId (class UtmpDisplayId)
               Specifies  whether  or  not  xterm  should  try  to  record the display identifier
               (display number and screen number) as well as the hostname in the system utmp  log
               file.  The default is “true”.

       utmpInhibit (class UtmpInhibit)
               Specifies  whether  or  not  xterm should try to record the user's terminal in the
               system utmp log file.  If true, xterm will not try.  The default is “false”.

       waitForMap (class WaitForMap)
               Specifies whether or not xterm should wait  for  the  initial  window  map  before
               starting  the  subprocess.  This is part of the ptyHandshake logic.  When xterm is
               directed to wait in this fashion, it passes the terminal size from the display end
               of  the  pseudo-terminal  to  the  terminal  I/O  connection, e.g., using the size
               according to the window manager.  Otherwise, it uses the size as given in resource
               values or command-line option -geom.  The default is “false”.

       zIconBeep (class ZIconBeep)
               Same  as  -ziconbeep command line argument.  If the value of this resource is non-
               zero, xterms that produce output while iconified will cause an XBell sound at  the
               given volume and have “*** ” prepended to their icon titles.  Most window managers
               will detect this change immediately, showing you which window has the output.   (A
               similar feature was in x10 xterm.)  The default is “false”.

       zIconTitleFormat (class ZIconTitleFormat)
               Allow  customization  of  the  string  used in the zIconBeep feature.  The default
               value is “*** %s”.

               If the resource value contains a “%s”, then xterm inserts the icon title  at  that
               point  rather  than prepending the string to the icon title.  (Only the first “%s”
               is used).

   VT100 Widget Resources
       The following resources are specified as part of the vt100 widget (class VT100).  They are
       specified by patterns such as “XTerm.vt100.NAME”.

       If  your  xterm  is configured to support the “toolbar”, then those patterns need an extra
       level for the form-widget which holds the toolbar and vt100 widget.   A  wildcard  between
       the  top-level “XTerm” and the “vt100” widget makes the resource settings work for either,
       e.g., “XTerm*vt100.NAME”.

       activeIcon (class ActiveIcon)
               Specifies whether or not active icon windows are to be used when the xterm  window
               is  iconified,  if  this  feature  is  compiled  into xterm.  The active icon is a
               miniature representation of the content of the  window  and  will  update  as  the
               content  changes.   Not  all  window managers necessarily support application icon
               windows.  Some window managers will allow you to enter keystrokes into the  active
               icon window.  The default is “default”.

               Xterm accepts either a keyword (ignoring case) or the number shown in parentheses:

               false (0)
                      No active icon is shown.

               true (1)
                      The active icon is shown.  If you are using twm, use this setting to enable
                      active-icons.

               default (2)
                      Xterm checks at startup, and shows an active icon only for window  managers
                      which  it  can  identify and which are known to support the feature.  These
                      are fvwm (full support), and window maker (limited).  A few  other  windows
                      managers  (such  as  twm and ctwm) support active icons, but do not support
                      the extensions which allow xterm to identify the window manager.

       allowBoldFonts (class AllowBoldFonts)
               When set to “false”, xterm will not use  bold  fonts.   This  overrides  both  the
               alwaysBoldMode and the boldMode resources.  alwaysBoldMode (class AlwaysBoldMode)

       allowC1Printable (class AllowC1Printable)
               If  true,  overrides  the  mapping  of C1 controls (codes 128-159) to make them be
               treated as if they were printable characters.  Although  this  corresponds  to  no
               particular standard, some users insist it is a VT100.  The default is “false”.

       allowColorOps (class AllowColorOps)
               Specifies  whether  control  sequences that set/query the dynamic colors should be
               allowed.  ANSI colors are unaffected by this resource  setting.   The  default  is
               “true”.

       allowFontOps (class AllowFontOps)
               Specifies  whether  control  sequences  that set/query the font should be allowed.
               The default is “false”.

       allowPasteControls (class AllowPasteControls)
               If true, allow control characters such as BEL and CAN to  be  pasted.   Formatting
               characters  (tab,  newline)  are  always allowed.  Other C0 control characters are
               suppressed unless this resource is enabled.  The exact set of  control  characters
               (C0  and  C1)  depends  upon  whether  UTF-8  encoding  is  used,  as  well as the
               allowC1Printable resource.  The default is “false”.

       allowScrollLock (class AllowScrollLock)
               Specifies whether control sequences that set/query the Scroll Lock key  should  be
               allowed,  as well as whether the Scroll Lock key responds to user's keypress.  The
               default is “false”.

               When this feature is enabled, xterm will sense the state of the  Scroll  Lock  key
               each  time  it  acquires  focus.   Pressing  the  Scroll  Lock key toggles xterm's
               internal state, as well as toggling the associated LED.  While the Scroll Lock  is
               active,  xterm  attempts  to  keep  a  viewport  on the same set of lines.  If the
               current viewport is scrolled past the limit set by the  saveLines  resource,  then
               Scroll Lock has no further effect.

               The reason for setting the default to “false” is to avoid user surprise.  This key
               is generally unused in keyboard configurations, and has not  acquired  a  standard
               meaning even when it is used in that manner.  Consequently, users have assigned it
               for ad hoc purposes.

       allowSendEvents (class AllowSendEvents)
               Specifies whether or not synthetic key and button events (generated  using  the  X
               protocol  SendEvent  request)  should be interpreted or discarded.  The default is
               “false” meaning they are discarded.  Note that allowing such events would create a
               very large security hole, therefore enabling this resource forcefully disables the
               allowXXXOps resources.  The default is “false”.

       allowTcapOps (class AllowTcapOps)
               Specifies whether control sequences  that  query  the  terminal's  notion  of  its
               function-key  strings, as termcap or terminfo capabilities should be allowed.  The
               default is “true”.

               A few programs, e.g., vim, use this feature to get an accurate description of  the
               terminal's capabilities, independent of the termcap/terminfo setting:

               ·   Xterm  can  tell  the querying program how many colors it supports.  This is a
                   constant, depending on how it is compiled, typically 16.  It does  not  change
                   if you alter resource settings, e.g., the boldColors resource.

               ·   Xterm can tell the querying program what strings are sent by modified (shift-,
                   control-, alt-)  function-  and  keypad-keys.   Reporting  control-  and  alt-
                   modifiers is a feature that relies on the ncurses extended naming.

       allowTitleOps (class AllowTitleOps)
               Specifies  whether  control  sequences  that  modify the window title or icon name
               should be allowed.  The default is “true”.

       allowWindowOps (class AllowWindowOps)
               Specifies whether extended window control sequences (as used in dtterm) should  be
               allowed.  These include several control sequences which manipulate the window size
               or position, as well as reporting these values and the title or icon  name.   Each
               of  these can be abused in a script; curiously enough most terminal emulators that
               implement these restrict only a small part of the  repertoire.   For  fine-tuning,
               see disallowedWindowOps.  The default is “false”.

       altIsNotMeta (class AltIsNotMeta)
               If “true”, treat the Alt-key as if it were the Meta-key.  Your keyboard may happen
               to be configured so they are the same.  But if they are not, this  allows  you  to
               use  the  same  prefix- and shifting operations with the Alt-key as with the Meta-
               key.  See altSendsEscape and metaSendsEscape.  The default is “false”.

       altSendsEscape (class AltSendsEscape)
               This is an additional keyboard operation that may be processed after the logic for
               metaSendsEscape.  It is only available if the altIsNotMeta resource is set.

               ·   If  “true”,  Alt characters (a character combined with the modifier associated
                   with left/right Alt-keys) are converted into a two-character sequence with the
                   character  itself  preceded  by  ESC.   This  applies  as well to function key
                   control  sequences,  unless  xterm  sees  that  Alt  is  used  in   your   key
                   translations.

               ·   If  “false”,  Alt  characters  input  from the keyboard cause a shift to 8-bit
                   characters (just like metaSendsEscape).   By  combining  the  Alt-  and  Meta-
                   modifiers,  you  can create corresponding combinations of ESC-prefix and 8-bit
                   characters.

               The default is “False”.  Xterm provides a menu option for toggling this resource.

       alternateScroll (class ScrollCond)
               If “true”, the scroll-back and scroll-forw actions send cursor-up and  -down  keys
               when xterm is displaying the alternate screen.  The default is “false”.

               The alternateScroll state can also be set using a control sequence.

       alwaysBoldMode (class AlwaysBoldMode)
               Specifies  whether  xterm  should  check if the normal and bold fonts are distinct
               before deciding whether to use overstriking  to  simulate  bold  fonts.   If  this
               resource  is  true, xterm does not make the check for distinct fonts when deciding
               how to handle the boldMode resource.  The default is “false”.

               boldMode   alwaysBoldMode   Comparison   Action
               ────────────────────────────────────────────────────
               false      false            ignored      use font
               false      true             ignored      use font
               true       false            same         overstrike
               true       false            different    use font
               true       true             ignored      overstrike

               This resource is used only for bitmap fonts:

               ·   When using bitmap fonts, it is possible that the font server will  approximate
                   the  bold  font by rescaling it from a different font size than expected.  The
                   alwaysBoldMode resource allows the  user  to  override  the  (sometimes  poor)
                   resulting bold font with overstriking (which is at least consistent).

               ·   The  problem  does  not  occur  with TrueType fonts (though there can be other
                   unnecessary issues such as different coverage of the normal and bold fonts).

               As an alternative, setting the allowBoldFonts resource to false overrides both the
               alwaysBoldMode and the boldMode resources.

       alwaysHighlight (class AlwaysHighlight)
               Specifies  whether  or  not xterm should always display a highlighted text cursor.
               By default (if this resource is false), a hollow text cursor is displayed whenever
               the  pointer  moves  out  of  the window or the window loses the input focus.  The
               default is “false”.

       alwaysUseMods (class AlwaysUseMods)
               Override the numLock resource, telling xterm to use the Alt and Meta modifiers  to
               construct  parameters for function key sequences even if those modifiers appear in
               the translations resource.  Normally xterm checks if Alt or  Meta  is  used  in  a
               translation that would conflict with function key modifiers, and will ignore these
               modifiers in that special case.  The default is “false”.

       answerbackString (class AnswerbackString)
               Specifies the string that xterm sends in response to an ENQ (control/E)  character
               from  the  host.   The  default  is  a  blank  string, i.e., “”.  A hardware VT100
               implements this feature as a setup option.

       appcursorDefault (class AppcursorDefault)
               If “true”, the cursor keys are initially in application mode.  This is the same as
               the VT102 private DECCKM mode, The default is “false”.

       appkeypadDefault (class AppkeypadDefault)
               If  “true”,  the  keypad  keys  are initially in application mode.  The default is
               “false”.

       assumeAllChars (class AssumeAllChars)
               If “true”, this enables a special case in bitmap fonts to allow the font server to
               choose how to display missing glyphs.  The default is “true”.

               The reason for this resource is to help with certain quasi-automatically generated
               fonts (such as the ISO-10646-1 encoding of Terminus) which  have  incorrect  font-
               metrics.

       autoWrap (class AutoWrap)
               Specifies  whether  or not auto-wraparound should be enabled.  This is the same as
               the VT102 DECAWM.  The default is “true”.

       awaitInput (class AwaitInput)
               Specifies whether or not xterm uses a 50 millisecond timeout to await input (i.e.,
               to support the Xaw3d arrow scrollbar).  The default is “false”.

       backarrowKey (class BackarrowKey)
               Specifies  whether  the  backarrow  key  transmits a backspace (8) or delete (127)
               character.  This corresponds to the  DECBKM  control  sequence.   A  “true”  value
               specifies  backspace.   The  default  is “True”.  Pressing the control key toggles
               this behavior.

       background (class Background)
               Specifies the color to use for the background  of  the  window.   The  default  is
               “XtDefaultBackground”.

       bellIsUrgent (class BellIsUrgent)
               Specifies  whether  to  set  the Urgency hint for the window manager when making a
               bell sound.  The default is “false”.

       bellOnReset (class BellOnReset)
               Specifies whether to sound a bell when doing a hard reset.  The default is “true”.

       bellSuppressTime (class BellSuppressTime)
               Number of milliseconds after a bell command is sent during which additional  bells
               will  be suppressed.  Default is 200.  If set non-zero, additional bells will also
               be suppressed until the server reports that processing of the first bell has  been
               completed; this feature is most useful with the visible bell.

       boldColors (class ColorMode)
               Specifies whether to combine bold attribute with colors like the IBM PC, i.e., map
               colors 0 through 7 to colors 8  through  15.   These  normally  are  the  brighter
               versions of the first 8 colors, hence bold.  The default is “true”.

       boldFont (class BoldFont)
               Specifies  the  name of the bold font to use instead of overstriking.  There is no
               default for this resource.

               This font must be the same height and width as the normal font,  otherwise  it  is
               ignored.  If only one of the normal or bold fonts is specified, it will be used as
               the normal font and the bold font will be produced by overstriking this font.

               See also the discussion of boldMode and alwaysBoldMode resources.

       boldMode (class BoldMode)
               This specifies whether or not text with the bold attribute should be overstruck to
               simulate  bold fonts if the resolved bold font is the same as the normal font.  It
               may be desirable to disable bold fonts when color  is  being  used  for  the  bold
               attribute.

               Note that xterm has one bold font which you may set explicitly.  Xterm attempts to
               derive a bold font for the other font selections (font1  through  font6).   If  it
               cannot  find  a bold font, it will use the normal font.  In each case (whether the
               explicit resource or the derived font), if the normal and bold fonts are distinct,
               this resource has no effect.  The default is “true”.

               See the alwaysBoldMode resource which can modify the behavior of this resource.

               Although  xterm attempts to derive a bold font for other font selections, the font
               server may not cooperate.  Since X11R6, bitmap fonts have been scaled.   The  font
               server  claims to provide the bold font that xterm requests, but the result is not
               always readable.  XFree86 introduced a feature which can be used to  suppress  the
               scaling.   In  the  X  server's  configuration  file  (e.g., “/etc/X11/XFree86” or
               “/etc/X11/xorg.conf”), you can  add  “:unscaled”  to  the  end  of  the  directory
               specification  for the “misc” fonts, which comprise the fixed-pitch fonts that are
               used by xterm.  For example

                   FontPath                 "/usr/lib/X11/fonts/misc/"

               would become

                   FontPath                 "/usr/lib/X11/fonts/misc/:unscaled"

               Depending on your configuration, the font server may have  its  own  configuration
               file.   The  same “:unscaled” can be added to its configuration file at the end of
               the directory specification for “misc”.

               The bitmap scaling feature is also used by xterm to implement  VT102  double-width
               and double-height characters.

       brokenLinuxOSC (class BrokenLinuxOSC)
               If  true,  xterm applies a workaround to ignore malformed control sequences that a
               Linux script might send.  Compare the  palette  control  sequences  documented  in
               console_codes with ECMA-48.  The default is “true”.

       brokenSelections (class BrokenSelections)
               If  true, xterm in 8-bit mode will interpret STRING selections as carrying text in
               the current  locale's  encoding.   Normally  STRING  selections  carry  ISO-8859-1
               encoded  text.   Setting  this  resource  to  “true”  violates  the ICCCM; it may,
               however, be useful for interacting with some broken X  clients.   The  default  is
               “false”.

       brokenStringTerm (class BrokenStringTerm)
               provides  a  work-around  for some ISDN routers which start an application control
               string without completing it.  Set this to “true” if xterm appears to freeze  when
               connecting.  The default is “false”.

               Xterm's state parser recognizes several types of control strings which can contain
               text, e.g.,

               APC (Application Program Command),
               DCS (Device Control String),
               OSC (Operating System Command),
               PM (Privacy Message), and
               SOS (Start of String),

               Each should end with a string-terminator (a special character which cannot  appear
               in  these  strings).   Ordinary control characters found within the string are not
               ignored; they are processed without interfering with the process  of  accumulating
               the  control  string's  content.   Xterm  recognizes  these controls in all modes,
               although some of the functions may be suppressed after parsing the control.

               When enabled, this feature allows the user to exit from  an  unterminated  control
               string when any of these ordinary control characters are found:

               control/D (used as an end of file in many shells),
               control/H (backspace),
               control/I (tab-feed),
               control/J (line feed aka newline),
               control/K (vertical tab),
               control/L (form feed),
               control/M (carriage return),
               control/N (shift-out),
               control/O (shift-in),
               control/Q (XOFF),
               control/X (cancel)

       c132 (class C132)
               Specifies whether or not the VT102 DECCOLM escape sequence, used to switch between
               80 and 132 columns, should be honored.  The default is “false”.

       cacheDoublesize (class CacheDoublesize)
               Tells whether to cache double-sized fonts by xterm.  Set this to zero  to  disable
               double-sized fonts altogether.

       cdXtraScroll (class CdXtraScroll)
               Specifies  whether  xterm  should  scroll  to  a  new page when clearing the whole
               screen.  Like tiXtraScroll, the intent of this option is to provide a  picture  of
               the  full-screen  application's  display  on  the scrollback before wiping out the
               text.  The default for this resource is “false”.

       charClass (class CharClass)
               Specifies  comma-separated  lists  of  character  class  bindings  of   the   form
               [low-]high:value.   These  are used in determining which sets of characters should
               be treated the same when doing cut and paste.  See the CHARACTER CLASSES section.

       cjkWidth (class CjkWidth)
               Specifies whether xterm should follow the traditional East Asian width convention.
               When turned on, characters with East Asian Ambiguous (A) category in UTR 11 have a
               column width of 2.  You may have to set this option to “true” if you have some old
               East Asian terminal based programs that assume that line-drawing characters have a
               column width of 2.  If this resource is false, the mkWidth resource  controls  the
               choice  between  the system's wcwidth and xterm's built-in tables.  The default is
               “false”.

       color0 (class Color0)

       color1 (class Color1)

       color2 (class Color2)

       color3 (class Color3)

       color4 (class Color4)

       color5 (class Color5)

       color6 (class Color6)

       color7 (class Color7)
               These  specify  the  colors  for  the  ISO-6429  extension.   The  defaults   are,
               respectively,  black,  red3,  green3, yellow3, a customizable dark blue, magenta3,
               cyan3, and gray90.  The default shades of color are chosen  to  allow  the  colors
               8-15 to be used as brighter versions.

       color8 (class Color8)

       color9 (class Color9)

       color10 (class Color10)

       color11 (class Color11)

       color12 (class Color12)

       color13 (class Color13)

       color14 (class Color14)

       color15 (class Color15)
               These  specify the colors for the ISO-6429 extension if the bold attribute is also
               enabled.  The default  resource  values  are  respectively,  gray30,  red,  green,
               yellow, a customizable light blue, magenta, cyan, and white.

       color16 (class Color16)

       through

       color255 (class Color255)
               These specify the colors for the 256-color extension.  The default resource values
               are for colors 16 through 231 to make a 6x6x6 color cube, and colors  232  through
               255 to make a grayscale ramp.

               Resources past color15 are available as a compile-time option.  Due to a hardcoded
               limit in the X libraries on the total number of resources (to 400), the  resources
               for  256-colors  are  omitted  when  wide-character  support and luit are enabled.
               Besides inconsistent  behavior  if  only  part  of  the  resources  were  allowed,
               determining  the  exact  cutoff is difficult, and the X libraries tend to crash if
               the number of resources exceeds the limit.  The color palette is still initialized
               to the same default values, and can be modified via control sequences.

               On  the  other hand, the resource limit does permit including the entire range for
               88-colors.

       colorAttrMode (class ColorAttrMode)
               Specifies whether colorBD, colorBL, colorRV,  and  colorUL  should  override  ANSI
               colors.   If  not,  these are displayed only when no ANSI colors have been set for
               the corresponding position.  The default is “false”.

       colorBD (class ColorBD)
               This specifies the color to use to display bold characters  if  the  “colorBDMode”
               resource is enabled.  The default is “XtDefaultForeground”.

               See also the veryBoldColors resource which allows combining bold and color.

       colorBDMode (class ColorAttrMode)
               Specifies  whether characters with the bold attribute should be displayed in color
               or as bold characters.  Note that  setting  colorMode  off  disables  all  colors,
               including bold.  The default is “false”.

       colorBL (class ColorBL)
               This  specifies  the color to use to display blink characters if the “colorBLMode”
               resource is enabled.  The default is “XtDefaultForeground”.

               See also the veryBoldColors resource which allows combining underline and color.

       colorBLMode (class ColorAttrMode)
               Specifies whether characters with the  blink  attribute  should  be  displayed  in
               color.   Note that setting colorMode off disables all colors, including this.  The
               default is “false”.

       colorIT (class ColorIT)
               This specifies the color to use to display italic characters if the  “colorITMode”
               resource is enabled.  The default is “XtDefaultForeground”.

               See also the veryBoldColors resource which allows combining attributes and color.

       colorITMode (class ColorAttrMode)
               Specifies  whether  characters  with  the  italic attribute should be displayed in
               color or as italic characters.  The default is “false”.

               Note that:

               ·   Setting colorMode off disables all colors, including italic.

               ·   The italicULMode resource overrides colorITMode.

       colorMode (class ColorMode)
               Specifies whether or not  recognition  of  ANSI  (ISO-6429)  color  change  escape
               sequences should be enabled.  The default is “true”.

       colorRV (class ColorRV)
               This specifies the color to use to display reverse characters if the “colorRVMode”
               resource is enabled.  The default is “XtDefaultForeground”.

               See also the veryBoldColors resource which allows combining reverse and color.

       colorRVMode (class ColorAttrMode)
               Specifies whether characters with the reverse attribute  should  be  displayed  in
               color.   Note that setting colorMode off disables all colors, including this.  The
               default is “false”.

       colorUL (class ColorUL)
               This  specifies  the  color  to  use  to  display  underlined  characters  if  the
               “colorULMode” resource is enabled.  The default is “XtDefaultForeground”.

               See also the veryBoldColors resource which allows combining underline and color.

       colorULMode (class ColorAttrMode)
               Specifies  whether  characters with the underline attribute should be displayed in
               color or as underlined characters.  Note that setting colorMode off  disables  all
               colors, including underlining.  The default is “false”.

       combiningChars (class CombiningChars)
               Specifies  the  number  of  wide-characters  which  can  be  stored  in  a cell to
               overstrike (combine) with the base character of the cell.   This  can  be  set  to
               values in the range 0 to 4.  The default is “2”.

       ctrlFKeys (class CtrlFKeys)
               In  VT220  keyboard mode (see sunKeyboard resource), specifies the amount by which
               to shift F1-F12 given a control modifier (CTRL).  This allows you to generate  key
               symbols  for  F10-F20 on a Sun/PC keyboard.  The default is “10”, which means that
               CTRL F1 generates the key symbol for F11.

       curses (class Curses)
               Specifies whether or not the last column bug in more(1) should be  worked  around.
               See the -cu option for details.  The default is “false”.

       cursorBlink (class CursorBlink)
               Specifies whether to make the cursor blink.  The default is “false”.

               Xterm  uses  two  variables to determine whether the cursor blinks.  One is set by
               this resource.  The other is  set  by  control  sequences  (private  mode  12  and
               DECSCUSR).  Xterm tests the XOR of the two variables.

       cursorColor (class CursorColor)
               Specifies   the   color   to   use   for   the   text   cursor.   The  default  is
               “XtDefaultForeground”.  By default, xterm attempts to keep this color  from  being
               the  same  as  the  background  color,  since  it  draws the cursor by filling the
               background of a text cell.  The same  restriction  applies  to  control  sequences
               which may change this color.

               Setting  this  resource overrides most of xterm's adjustments to cursor color.  It
               will still use reverse-video to disallow some cases, such as a black cursor  on  a
               black background.

       cursorOffTime (class CursorOffTime)
               Specifies  the  duration  of  the  “off”  part  of  the cursor blink cycle-time in
               milliseconds.  The same timer is used for text blinking.  The default is “300”.

       cursorOnTime (class CursorOnTime)
               Specifies the duration of the  “on”  part  of  the  cursor  blink  cycle-time,  in
               milliseconds.  The same timer is used for text blinking.  The default is “600”.

       cutNewline (class CutNewline)
               If  “false”,  triple clicking to select a line does not include the Newline at the
               end of the line.  If “true”, the Newline is selected.  The default is “true”.

       cursorUnderLine (class CursorUnderLine)
               Specifies whether to make the cursor underlined or a box.  The default is “false”.

       cutToBeginningOfLine (class CutToBeginningOfLine)
               If “false”, triple clicking to select a line selects only from  the  current  word
               forward.  If “true”, the entire line is selected.  The default is “true”.

       decTerminalID (class DecTerminalID)
               Specifies  the emulation level (100=VT100, 220=VT220, etc.), used to determine the
               type of response to a DA  control  sequence.   Leading  non-digit  characters  are
               ignored, e.g., “vt100” and “100” are the same.  The default is “420”.

       defaultString (class DefaultString)
               Specify  the  character  (or  string) which xterm will substitute when pasted text
               includes a character which cannot be represented in  the  current  encoding.   For
               instance,  pasting UTF-8 text into a display of ISO-8859-1 characters will only be
               able to display codes 0-255, while UTF-8 text can  include  Unicode  values  above
               255.  The default is “#” (a single pound sign).

               If  the undisplayable text would be double-width, xterm will add a space after the
               “#” character, to give roughly the same layout on the screen as the original text.

       deleteIsDEL (class DeleteIsDEL)
               Specifies whether the Delete key on the editing keypad should send  DEL  (127)  or
               the  VT220-style Remove escape sequence.  A “false” value enables the latter.  The
               default is “Maybe”.

       disallowedColorOps (class DisallowedColorOps)
               Specify which features will be disabled if allowColorOps  is  false.   This  is  a
               comma-separated list of names.  The default value is
               SetColor,GetColor,GetAnsiColor

               The  names  are listed below.  Xterm ignores capitalization, but they are shown in
               mixed-case for clarity.

               SetColor
                    Set a specific dynamic color.

               GetColor
                    Report the current setting of a given dynamic color.

               GetAnsiColor
                    Report the current setting of a given ANSI color (actually any of the  colors
                    set via ANSI-style controls).

       disallowedFontOps (class DisallowedFontOps)
               Specify  which  features  will  be  disabled  if allowFontOps is false.  This is a
               comma-separated list of names.  The default value is
               SetFont,GetFont

               The names are listed below.  Xterm ignores capitalization, but they are  shown  in
               mixed-case for clarity.

               SetFont
                    Set the specified font.

               GetFont
                    Report the specified font.

       disallowedTcapOps (class DisallowedTcapOps)
               Specify  which  features  will  be  disabled  if allowTcapOps is false.  This is a
               comma-separated list of names.  The default value is
               SetTcap,GetTcap

               The names are listed below.  Xterm ignores capitalization, but they are  shown  in
               mixed-case for clarity.

               SetTcap
                    (not implemented)

               GetTcap
                    Report specified function- and other special keys.

       disallowedWindowOps (class DisallowedWindowOps)
               Specify  which  features  will  be disabled if allowWindowOps is false.  This is a
               comma-separated list of names, or  (for  the  controls  adapted  from  dtterm  the
               operation number).  The default value is
               1,2,3,4,5,6,7,8,9,11,13,14,18,19,20,21,GetSelection,SetSelection,SetWinLines,SetXprop
       (i.e. no operations are allowed).

               The names are listed below.  Xterm ignores capitalization, but they are  shown  in
               mixed-case for clarity.  Where a number can be used as an alternative, it is given
               in parentheses after the name.

               GetIconTitle (20)
                    Report xterm window's icon label as a string.

               GetScreenSizeChars (19)
                    Report the size of the screen in characters as numbers.

               GetSelection
                    Report selection data as a base64 string.

               GetWinPosition (13)
                    Report xterm window position as numbers.

               GetWinSizeChars (18)
                    Report the size of the text area in characters as numbers.

               GetWinSizePixels (14)
                    Report xterm window in pixels as numbers.

               GetWinState (11)
                    Report xterm window state as a number.

               GetWinTitle (21)
                    Report xterm window's title as a string.

               LowerWin (6)
                    Lower the xterm window to the bottom of the stacking order.

               MaximizeWin (9)
                    Maximize window (i.e., resize to screen size).

               FullscreenWin (10)
                    Use full screen (i.e., resize to screen size, without window decorations).

               MinimizeWin (2)
                    Iconify window.

               PopTitle (23)
                    Pop title from internal stack.

               PushTitle (22)
                    Push title to internal stack.

               RaiseWin (5)
                    Raise the xterm window to the front of the stacking order.

               RefreshWin (7)
                    Refresh the xterm window.

               RestoreWin (1)
                    De-iconify window.

               SetSelection
                    Set selection data.

               SetWinLines
                    Resize to a given number of lines, at least 24.

               SetWinPosition (3)
                    Move window to given coordinates.

               SetWinSizeChars (8)
                    Resize the text area to given size in characters.

               SetWinSizePixels (4)
                    Resize the xterm window to given size in pixels.

               SetXprop
                    Set X property on top-level window.

       dynamicColors (class DynamicColors)
               Specifies whether or not escape sequences to change colors assigned  to  different
               attributes are recognized.

       eightBitControl (class EightBitControl)
               Specifies  whether  or not control sequences sent by the terminal should be eight-
               bit characters or escape sequences.  The default is “false”.

       eightBitInput (class EightBitInput)
               If “true”, Meta  characters  (a  single-byte  character  combined  with  the  Meta
               modifier  key)  input  from  the  keyboard  are  presented  as a single character,
               modified according to the eightBitMeta resource.  If “false”, Meta characters  are
               converted into a two-character sequence with the character itself preceded by ESC.
               The default is “true”.

               The metaSendsEscape  and  altSendsEscape  resources  may  override  this  feature.
               Generally  keyboards  do not have a key labeled “Meta”, but “Alt” keys are common,
               and they are conventionally used for “Meta”.  If they were  synonymous,  it  would
               have  been reasonable to name this resource “altSendsEscape”, reversing its sense.
               For more background on this, see the meta function in curses.

               Note that the Alt key is not necessarily the  same  as  the  Meta  modifier.   The
               xmodmap  utility  lists your key modifiers.  X defines modifiers for shift, (caps)
               lock and control, as well as 5 additional modifiers which are  generally  used  to
               configure key modifiers.  Xterm inspects the same information to find the modifier
               associated with either Meta key (left or right), and uses that  key  as  the  Meta
               modifier.   It  also looks for the NumLock key, to recognize the modifier which is
               associated with that.

               If your xmodmap configuration uses the same keycodes for Alt- and Meta-keys, xterm
               will  only  see  the Alt-key definitions, since those are tested before Meta-keys.
               NumLock is tested first.  It is important to keep these keys  distinct;  otherwise
               some of xterm's functionality is not available.

               The  eightBitInput resource is tested at startup time.  If “true”, the xterm tries
               to put the terminal into 8-bit mode.  If “false”, on startup, xterm tries  to  put
               the  terminal  into  7-bit  mode.   For  some configurations this is unsuccessful;
               failure is ignored.  After startup, xterm does not  change  the  terminal  between
               8-bit and 7-bit mode.

               As originally implemented in X11, the resource value did not change after startup.
               However (since patch #216 in 2006) xterm can modify  eightBitInput  after  startup
               via  a  control  sequence.   The corresponding terminfo capabilities smm (set meta
               mode) and rmm (reset meta mode) have  been  recognized  by  bash  for  some  time.
               Interestingly  enough,  bash's  notion  of  “meta  mode” differs from the standard
               definition (in the terminfo manual), which describes the change to the eighth  bit
               of  a character.  It happens that bash views “meta mode” as the ESC character that
               xterm puts before a character when a special meta key is  pressed.   bash's  early
               documentation talks about the ESC character and ignores the eighth bit.

       eightBitMeta (class EightBitMeta)
               This  controls the way xterm modifies the eighth bit of a single-byte key when the
               eightBitInput resource is set.  The default is “locale”.

               The resource value is a string, evaluated as a boolean after startup.

               false
                    The key is sent unmodified.

               locale
                    The key is modified only if the locale uses eight-bit encoding.

               true The key is sent modified.

               never
                    The key is always sent unmodified.

               Except for the never choice, xterm honors the terminfo capabilities smm (set  meta
               mode)  and  rmm  (reset  meta  mode),  allowing the feature to be turned on or off
               dynamically.

               If eightBitMeta is enabled when the locale uses UTF-8, xterm encodes the value  as
               UTF-8 (since patch #183 in 2003).

       eightBitOutput (class EightBitOutput)
               Specifies  whether  or  not  eight-bit  characters  sent  from  the host should be
               accepted as is or stripped when printed.  The default is “true”, which means  that
               they are accepted as is.

       eightBitSelectTypes (class EightBitSelectTypes)
               Override  xterm's  default selection target list (see SELECT/PASTE) for selections
               in normal (ISO-8859-1) mode.  The default is an empty string, i.e., “”, which does
               not override anything.

       faceName (class FaceName)
               Specify  the  pattern  for  scalable  fonts  selected from the FreeType library if
               support for that library was compiled into xterm.  There is no default value.

               If not specified, or if there is no match for both normal and  bold  fonts,  xterm
               uses the bitmap font and related resources.

               It is possible to select suitable bitmap fonts using a script such as this:

                   #!/bin/sh
                   FONT=`xfontsel -print`
                   test -n "$FONT" && xfd -fn "$FONT"

               However  (even  though  xfd  accepts  a  “-fa”  option  to denote FreeType fonts),
               xfontsel has not been similarly extended.  As a workaround, you may try

                   fc-list :scalable=true:spacing=mono: family

               to find a list of scalable fixed-pitch fonts which may be used  for  the  faceName
               resource value.

       faceNameDoublesize (class FaceNameDoublesize)
               Specify a double-width scalable font for cases where an application requires this,
               e.g., in CJK applications.  There is no default value.

               If the application uses double-wide characters and this  resource  is  not  given,
               xterm will use a scaled version of the font given by faceName.

       faceSize (class FaceSize)
               Specify  the pointsize for fonts selected from the FreeType library if support for
               that library was compiled into xterm.  The default is “14.0” On the VT Fonts menu,
               this corresponds to the Default entry.

               Although  the default is “14.0”, this may not be the same as the pointsize for the
               default bitmap font, i.e.,  that  assigned  with  the  -fn  option,  or  the  font
               resource.  For example, the “fixed” font usually has a pointsize of “8.0”.  If you
               set faceSize to match the size of the bitmap font, then switching  between  bitmap
               and TrueType fonts via the font menu will give comparable sizes for the window.

               You  can  specify  the  pointsize for TrueType fonts selected with the other size-
               related menu entries such as Medium, Huge, etc., by using  one  of  the  following
               resource  values.   If  you  do  not specify a value, they default to “0.0”, which
               causes xterm to use the ratio of font sizes from  the  corresponding  bitmap  font
               resources to obtain a TrueType pointsize.

               If  all of the faceSize resources are set, then xterm will use this information to
               determine the next smaller/larger  TrueType  font  for  the  larger-vt-font()  and
               smaller-vt-font()  actions.   If any are not set, xterm will use only the areas of
               the bitmap fonts.

       faceSize1 (class FaceSize1)
               Specifies the pointsize of the first alternative font.

       faceSize2 (class FaceSize2)
               Specifies the pointsize of the second alternative font.

       faceSize3 (class FaceSize3)
               Specifies the pointsize of the third alternative font.

       faceSize4 (class FaceSize4)
               Specifies the pointsize of the fourth alternative font.

       faceSize5 (class FaceSize5)
               Specifies the pointsize of the fifth alternative font.

       faceSize6 (class FaceSize6)
               Specifies the pointsize of the sixth alternative font.

       font (class Font)
               Specifies the name of the normal font.  The default is “fixed”.

               See the discussion of the locale resource, which describes how this  font  may  be
               overridden.

               NOTE: some resource files use patterns such as

                   *font: fixed

               which are overly broad, affecting both

                   xterm.vt100.font

               and

                   xterm.vt100.utf8Fonts.font

               which is probably not what you intended.

       fastScroll (class FastScroll)
               Modifies  the  effect  of jump scroll (jumpScroll) by suppressing screen refreshes
               for the special case when output to the screen has completely shifted the contents
               off-screen.  For instance, cat'ing a large file to the screen does this.

       font1 (class Font1)
               Specifies the name of the first alternative font, corresponding to “Unreadable” in
               the standard menu.

       font2 (class Font2)
               Specifies the name of the second alternative font, corresponding to “Tiny” in  the
               standard menu.

       font3 (class Font3)
               Specifies  the name of the third alternative font, corresponding to “Small” in the
               standard menu.

       font4 (class Font4)
               Specifies the name of the fourth alternative font, corresponding  to  “Medium”  in
               the standard menu.

       font5 (class Font5)
               Specifies  the name of the fifth alternative font, corresponding to “Large” in the
               standard menu.

       font6 (class Font6)
               Specifies the name of the sixth alternative font, corresponding to “Huge”  in  the
               standard menu.

       fontDoublesize (class FontDoublesize)
               Specifies  whether  xterm  should attempt to use font scaling to draw double-sized
               characters.  Some  older  font  servers  cannot  do  this  properly,  will  return
               misleading font metrics.  The default is “true”.  If disabled, xterm will simulate
               double-sized characters by drawing normal characters with spaces between them.

       fontWarnings (class FontWarnings)
               Specify whether xterm should report an error if it fails to load a font:

               0    Never report an error (though the X libraries may).

               1    Report an error if the font name was given as a resource setting.

               2    Always report an error on failure to load a font.

               The default is “1”.

       forceBoxChars (class ForceBoxChars)
               Specifies whether xterm should assume the normal and bold fonts have  VT100  line-
               drawing characters:

               ·   The fixed-pitch ISO-8859-*-encoded fonts used by xterm normally have the VT100
                   line-drawing glyphs in cells  1-31.   Other  fixed-pitch  fonts  may  be  more
                   attractive, but lack these glyphs.

               ·   When  using an ISO-10646-1 font and the wideChars resource is true, xterm uses
                   the Unicode glyphs which match the VT100 line-drawing glyphs.

               If “false”, xterm checks for missing glyphs in the  font  and  makes  line-drawing
               characters directly as needed.  If “true”, xterm assumes the font does not contain
               the line-drawing characters, and draws them directly.  The default is “false”.

       forcePackedFont (class ForcePackedFont)
               Specifies whether xterm should  use  the  maximum  or  minimum  glyph  width  when
               displaying  using  a bitmap font.  Use the maximum width to help with proportional
               fonts.  The default is “true”, denoting the minimum width.

       foreground (class Foreground)
               Specifies the color to use for displaying text in the window.  Setting  the  class
               name  instead  of  the  instance name is an easy way to have everything that would
               normally  appear   in   the   text   color   change   color.    The   default   is
               “XtDefaultForeground”.

       formatOtherKeys (class FormatOtherKeys)
               Overrides  the format of the escape sequence used to report modified keys with the
               modifyOtherKeys resource.

               0  send modified keys as parameters for function-key 27 (default).

               1  send modified keys as parameters for CSI u.

       freeBoldBox (class FreeBoldBox)
               Specifies whether xterm should assume the bounding boxes for normal and bold fonts
               are  compatible.   If “false”, xterm compares them and will reject choices of bold
               fonts that do not match the size of the normal  font.   The  default  is  “false”,
               which means that the comparison is performed.

       geometry (class Geometry)
               Specifies  the  preferred  size  and  position  of  the VT102 window.  There is no
               default for this resource.

       highlightColor (class HighlightColor)
               Specifies the color to use for the background of selected (highlighted) text.   If
               not specified (i.e., matching the default foreground), reverse video is used.  The
               default is “XtDefaultForeground”.

       highlightColorMode (class HighlightColorMode)
               Specifies whether  xterm  should  use  highlightTextColor  and  highlightColor  to
               override the reversed foreground/background colors in a selection.  The default is
               unspecified: at startup, xterm checks if those  resources  are  set  to  something
               other  than  the  default foreground and background colors.  Setting this resource
               disables the check.

               The  following  table  shows  the  interaction  of  the  highlighting   resources,
               abbreviated as shown to fit in this page:

               HCM
                  highlightColorMode

               HR highlightReverse

               HBG
                  highlightColor

               HFG
                  highlightTextColor

               HCM       HR      HBG       HFG       Highlight
               ──────────────────────────────────────────────────────
               false     false   default   default   bg/fg
               false     false   default   set       bg/fg
               false     false   set       default   fg/HBG
               false     false   set       set       fg/HBG
               ──────────────────────────────────────────────────────
               false     true    default   default   bg/fg
               false     true    default   set       bg/fg
               false     true    set       default   fg/HBG
               false     true    set       set       fg/HBG
               ──────────────────────────────────────────────────────
               true      false   default   default   bg/fg
               true      false   default   set       HFG/fg
               true      false   set       default   bg/HBG
               true      false   set       set       HFG/HBG
               ──────────────────────────────────────────────────────
               true      true    default   default   fg/fg (useless)
               true      true    default   set       HFG/fg
               true      true    set       default   fg/HBG
               true      true    set       set       HFG/HBG
               ──────────────────────────────────────────────────────
               default   false   default   default   bg/fg
               default   false   default   set       bg/fg
               default   false   set       default   fg/HBG
               default   false   set       set       HFG/HBG
               ──────────────────────────────────────────────────────
               default   true    default   default   bg/fg
               default   true    default   set       bg/fg
               default   true    set       default   fg/HBG
               default   true    set       set       HFG/HBG
               ──────────────────────────────────────────────────────

       highlightReverse (class HighlightReverse)
               Specifies  whether  xterm  should  reverse the selection foreground and background
               colors when selecting text with reverse-video attribute.  This applies only to the
               highlightColor  and  highlightTextColor resources, e.g., to match the color scheme
               of xwsh.  If “true”, xterm reverses the colors, If “false”, xterm does not reverse
               colors, The default is “true”.

       highlightSelection (class HighlightSelection)
               If  “false”,  selecting  with  the  mouse  highlights  all positions on the screen
               between the beginning of the selection and the current position.  If “true”, xterm
               highlights only the positions that contain text that can be selected.  The default
               is “false”.

               Depending on the way your applications write to the screen, there may be  trailing
               blanks  on  a  line.  Xterm stores data as it is shown on the screen.  Erasing the
               display changes the internal state of each cell so it is not  considered  a  blank
               for the purpose of selection.  Blanks written since the last erase are selectable.
               If you do not wish to have trailing blanks in a selection, use  the  trimSelection
               resource.

       highlightTextColor (class HighlightTextColor)
               Specifies  the color to use for the foreground of selected (highlighted) text.  If
               not specified (i.e., matching the default background), reverse video is used.  The
               default is “XtDefaultBackground”.

       hpLowerleftBugCompat (class HpLowerleftBugCompat)
               Specifies  whether  to  work  around  a bug in HP's xdb, which ignores termcap and
               always sends ESC F to move to the lower  left  corner.   “true”  causes  xterm  to
               interpret  ESC F as a request to move to the lower left corner of the screen.  The
               default is “false”.

       i18nSelections (class I18nSelections)
               If false, xterm will not request the targets COMPOUND_TEXT or TEXT.   The  default
               is  “true”.  It  may  be  set to false in order to work around ICCCM violations by
               other X clients.

       iconBorderColor (class BorderColor)
               Specifies the border color for the active icon window if this feature is  compiled
               into xterm.  Not all window managers will make the icon border visible.

       iconBorderWidth (class BorderWidth)
               Specifies  the border width for the active icon window if this feature is compiled
               into xterm.  The default is “2”.  Not all window managers  will  make  the  border
               visible.

       iconFont (class IconFont)
               Specifies  the  font  for  the  miniature  active  icon window, if this feature is
               compiled into xterm.  The default is “nil2”.

       initialFont (class InitialFont)
               Specifies which of the VT100 fonts to use initially.  Values are the same  as  for
               the set-vt-font action.  The default is “d”, i.e., “default”.

       inputMethod (class XtCInputMethod)
               Tells xterm which type of input method to use.  There is no default method.

       internalBorder (class BorderWidth)
               Specifies  the number of pixels between the characters and the window border.  The
               default is “2”.

       italicULMode (class ColorAttrMode)
               Specifies whether characters with the underline attribute should be  displayed  in
               an  italic  font or as underlined characters.  It is implemented only for TrueType
               fonts.

       jumpScroll (class JumpScroll)
               Specifies whether or not jump scroll should be  used.   This  corresponds  to  the
               VT102  DECSCLM  private  mode.   The  default  is  “true”.   See  fastScroll for a
               variation.

       keepClipboard (class KeepClipboard)
               Specifies whether xterm will reuse the selection  data  which  it  copied  to  the
               keyboard  rather  than  asking the clipboard for its current contents when told to
               provide the selection.  The default is “false”.

       keepSelection (class KeepSelection)
               Specifies whether xterm will keep the selection even after the selected  area  was
               touched by some output to the terminal.  The default is “true”.

       keyboardDialect (class KeyboardDialect)
               Specifies  the  initial  keyboard  dialect,  as well as the default value when the
               terminal is reset.  The value given is the same as  the  final  character  in  the
               control  sequences  which  change  character  sets.   The  default  is  “B”, which
               corresponds to US ASCII.

       nameKeymap (class NameKeymap)
               See the discussion of the keymap() action.

       limitResize (class LimitResize)
               Limits resizing of the screen via control sequence to  a  given  multiple  of  the
               display dimensions.  The default is “1”.

       locale (class Locale)
               Specifies  how  to  use  luit,  an  encoding  converter  between  UTF-8 and locale
               encodings.  The resource value (ignoring case) may be:

               true
                   Xterm will use the encoding specified by the  users'  LC_CTYPE  locale  (i.e.,
                   LC_ALL,  LC_CTYPE, or LANG variables) as far as possible.  This is realized by
                   always enabling UTF-8 mode and invoking luit in non-UTF-8 locales.

               medium
                   Xterm will follow users' LC_CTYPE locale only for UTF-8, east Asian, and  Thai
                   locales, where the encodings were not supported by conventional 8bit mode with
                   changing fonts.  For other locales, xterm will use conventional 8bit mode.

               checkfont
                   If mini-luit is compiled-in, xterm will check  if  a  Unicode  font  has  been
                   specified.   If so, it checks if the character encoding for the current locale
                   is POSIX, Latin-1 or Latin-9, uses the appropriate mapping  to  support  those
                   with the Unicode font.  For other encodings, xterm assumes that UTF-8 encoding
                   is required.

               false
                   Xterm will use conventional 8bit mode or UTF-8 mode according to utf8 resource
                   or -u8 option.

               Any  other value, e.g., “UTF-8” or “ISO8859-2”, is assumed to be an encoding name;
               luit will be invoked to support  the  encoding.   The  actual  list  of  supported
               encodings depends on luit.  The default is “medium”.

               Regardless  of  your  locale and encoding, you need an ISO-10646-1 font to display
               the result.  Your configuration may not include this font,  or  locale-support  by
               xterm  may  not  be  needed.  At startup, xterm uses a mechanism equivalent to the
               load-vt-fonts(utf8Fonts, Utf8Fonts) action to load font name subresources  of  the
               VT100  widget.  That is, resource patterns such as “*vt100.utf8Fonts.font” will be
               loaded, and (if this resource is enabled),  override  the  normal  fonts.   If  no
               subresources  are  found,  the normal fonts such as “*vt100.font”, etc., are used.
               The resource files distributed with xterm use ISO-10646-1 fonts, but do  not  rely
               on them unless you are using the locale mechanism.

       localeFilter (class LocaleFilter)
               Specifies  the  file  name for the encoding converter from/to locale encodings and
               UTF-8 which is used with the -lc option or  locale  resource.   The  help  message
               shown  by  “xterm  -help”  lists  the  default value, which depends on your system
               configuration.

               If the encoding converter requires command-line  parameters,  you  can  add  those
               after the command, e.g.,

                   *localeFilter: xterm-filter -p

               Alternatively,  you  may  put those parameter within a shell script to execute the
               converter, and set this resource to point to the shell script.

               When using a locale-filter, e.g., with the -e option, or the  shell,  xterm  first
               tries  passing control via that filter.  If it fails, xterm will retry without the
               locale-filter.  Xterm warns about the failure before retrying.

       loginShell (class LoginShell)
               Specifies whether or not the shell to be run in the window should be started as  a
               login shell.  The default is “false”.

       marginBell (class MarginBell)
               Specifies  whether  or  not  the  bell should be rung when the user types near the
               right margin.  The default is “false”.

       metaSendsEscape (class MetaSendsEscape)
               If “true”, Meta characters (a character combined with the Meta modifier  key)  are
               converted into a two-character sequence with the character itself preceded by ESC.
               This applies as well to function key control sequences,  unless  xterm  sees  that
               Meta is used in your key translations.  If “false”, Meta characters input from the
               keyboard are handled according to the  eightBitInput  resource.   The  default  is
               “False”.

       mkSamplePass (class MkSamplePass)
               If mkSampleSize is nonzero, and mkWidth (and cjkWidth) are false, on startup xterm
               compares its built-in tables to the system's wide character width data  to  decide
               if  it  will  use  the  system's  data.  It tests the first mkSampleSize character
               values, and allows up to mkSamplePass  mismatches  before  the  test  fails.   The
               default (for the allowed number of mismatches) is 256.

       mkSampleSize (class MkSampleSize)
               With  mkSamplePass,  this  specifies  a  startup  test  used for initializing wide
               character width calculations.  The default (number  of  characters  to  check)  is
               1024.

       mkWidth (class MkWidth)
               Specifies  whether xterm should use a built-in version of the wide character width
               calculation.  See also the cjkWidth resource which can override this.  The default
               is “false”.

               Here  is  a  summary  of  the resources which control the choice of wide character
               width calculation:

               cjkWidth   mkWidth   Action
               ───────────────────────────────────────────────────────────────
               false      false     use system tables subject to mkSamplePass
               false      true      use built-in tables
               true       false     use built-in CJK tables
               true       true      use built-in CJK tables

       modifyCursorKeys (class ModifyCursorKeys)
               Tells how to handle the  special  case  where  Control-,  Shift-,  Alt-  or  Meta-
               modifiers are used to add a parameter to the escape sequence returned by a cursor-
               key.  The default is “2”:

               -1   disables the feature.

               0    uses the old/obsolete behavior.

               1    prefixes modified sequences with CSI.

               2    forces the modifier to be the second parameter if it would otherwise  be  the
                    first.

               3    marks the sequence with a “>” to hint that it is private.

       modifyFunctionKeys (class ModifyFunctionKeys)
               Tells  how  to  handle  the  special  case  where  Control-, Shift-, Alt- or Meta-
               modifiers are used to add a  parameter  to  the  escape  sequence  returned  by  a
               (numbered)  function-key.  The default is “2”.  The resource values are similar to
               modifyCursorKeys:

               -1   permits the user to use shift- and control-modifiers to  construct  function-
                    key strings using the normal encoding scheme.

               0    uses the old/obsolete behavior.

               1    prefixes modified sequences with CSI.

               2    forces  the  modifier to be the second parameter if it would otherwise be the
                    first.

               3    marks the sequence with a “>” to hint that it is private.

               If modifyFunctionKeys is zero, xterm uses Control- and  Shift-modifiers  to  allow
               the  user  to  construct  numbered  function-keys  beyond  the set provided by the
               keyboard:

               Control
                    adds the value given by the ctrlFKeys resource.

               Shift
                    adds twice the value given by the ctrlFKeys resource.

               Control/Shift
                    adds three times the value given by the ctrlFKeys resource.

       modifyKeyboard (class ModifyKeyboard)
               Normally xterm makes a special case regarding modifiers (shift, control, etc.)  to
               handle  special  keyboard  layouts  (legacy  and  vt220).  This is done to provide
               compatible keyboards for DEC VT220 and  related  terminals  that  implement  user-
               defined keys (UDK).

               The  bits  of  the  resource  value  selectively  enable modification of the given
               category when these keyboards are selected.  The default is “0”:

               0    The  legacy/vt220  keyboards  interpret  only   the   Control-modifier   when
                    constructing numbered function-keys.  Other special keys are not modified.

               1    allows modification of the numeric keypad

               2    allows modification of the editing keypad

               4    allows  modification  of  function-keys,  overrides use of Shift-modifier for
                    UDK.

               8    allows modification of other special keys

       modifyOtherKeys (class ModifyOtherKeys)
               Like modifyCursorKeys, tells xterm to construct an escape sequence for other  keys
               (such  as  “2”)  when  modified by Control-, Alt- or Meta-modifiers.  This feature
               does not apply to function keys and well-defined keys such as ESC or  the  control
               keys.  The default is “0”:

               0    disables this feature.

               1    enables  this  feature  for  keys  except for those with well-known behavior,
                    e.g., Tab, Backarrow and some special control character cases, e.g., Control-
                    Space to make a NUL.

               2    enables this feature for keys including the exceptions listed.

       multiClickTime (class MultiClickTime)
               Specifies the maximum time in milliseconds between multi-click select events.  The
               default is “250” milliseconds.

       multiScroll (class MultiScroll)
               Specifies whether or not scrolling should be done asynchronously.  The default  is
               “false”.

       nMarginBell (class Column)
               Specifies  the number of characters from the right margin at which the margin bell
               should be rung, when enabled by the marginBell resource.  The default is “10”.

       numLock (class NumLock)
               If “true”, xterm checks if NumLock is used as a modifier (see xmodmap(1)).  If so,
               this  modifier is used to simplify the logic when implementing special NumLock for
               the sunKeyboard resource.  Also (when sunKeyboard is false), similar logic is used
               to  find the modifier associated with the left and right Alt keys.  The default is
               “true”.

       oldXtermFKeys (class OldXtermFKeys)
               If “true”, xterm will use old-style control sequences for function keys F1 to  F4,
               for  compatibility  with  X  Consortium xterm.  Otherwise, it uses the VT100-style
               codes for PF1 to PF4.  The default is “false”.

       on2Clicks (class On2Clicks)

       on3Clicks (class On3Clicks)

       on4Clicks (class On4Clicks)

       on5Clicks (class On5Clicks)
               Specify selection behavior in response to multiple mouse clicks.  A  single  mouse
               click  is  always  interpreted  as described in the SELECTION section (see POINTER
               USAGE).  Multiple mouse clicks (using the button which activates the  select-start
               action)  are  interpreted according to the resource values of on2Clicks, etc.  The
               resource value can be one of these:

               word
                  Select a “word” as determined by the charClass  resource.   See  the  CHARACTER
                  CLASSES section.

               line
                  Select a line (counting wrapping).

               group
                  Select a group of adjacent lines (counting wrapping).  The selection stops on a
                  blank line, and does not extend outside the current page.

               page
                  Select all visible lines, i.e., the page.

               all
                  Select all lines, i.e., including the saved lines.

               regex
                  Select a “word” as determined by the regular expression which  follows  in  the
                  resource value.

               none
                  No  selection  action is associated with this resource.  Xterm interprets it as
                  the end of the list.  For example, you  may  use  it  to  disable  triple  (and
                  higher) clicking by setting on3Clicks to “none”.

               The   default   values   for  on2Clicks  and  on3Clicks  are  “word”  and  “line”,
               respectively.  There is no default value for on4Clicks or on5Clicks, making  those
               inactive.   On  startup,  xterm  determines  the  maximum  number of clicks by the
               onXClicks resource values which are set.

       openIm (class XtCOpenIm)
               Tells xterm whether to open the input method at startup.  The default is “true”.

       pointerColor (class PointerColor)
               Specifies   the   foreground   color   of   the   pointer.    The    default    is
               “XtDefaultForeground”.

       pointerColorBackground (class PointerColorBackground)
               Specifies    the    background   color   of   the   pointer.    The   default   is
               “XtDefaultBackground”.

       pointerMode (class PointerMode)
               Specifies when the  pointer  may  be  hidden  as  the  user  types.   It  will  be
               redisplayed if the user moves the mouse, or clicks one of its buttons.

               0  never

               1  the  application  running  in  xterm has not activated mouse mode.  This is the
                  default.

               2  always.

       pointerShape (class Cursor)
               Specifies the name of the shape of the pointer.  The default is “xterm”.

       popOnBell (class PopOnBell)
               Specifies whether the window would be raised  when  Control-G  is  received.   The
               default is “false”.

               If  the  window is iconified, this has no effect.  However, the zIconBeep resource
               provides you with the ability to see which iconified windows have sounded a bell.

       precompose (class XtCPrecompose)
               Tells xterm whether to precompose UTF-8 data  into  Normalization  Form  C,  which
               combines  commonly-used  accents  onto  base  characters.  If it does not do this,
               accents are left as separatate characters.  The default is “true”.

       preeditType (class XtCPreeditType)
               Tells xterm which types of preedit (preconversion) string to display.  The default
               is “OverTheSpot,Root”.

       printAttributes (class PrintAttributes)
               Specifies  whether  to  print  graphic attributes along with the text.  A real DEC
               VTxxx terminal will print the underline, highlighting codes but your  printer  may
               not handle these.

               ·   “0” disables the attributes.

               ·   “1”  prints  the normal set of attributes (bold, underline, inverse and blink)
                   as VT100-style control sequences.

               ·   “2” prints ANSI color attributes as well.

               The default is “1”.

       printFileImmediate (PrintFileImmediate)
               When the print-immediate action is  invoked,  xterm  prints  the  screen  contents
               directly  to a file.  Set this resource to the prefix of the filename (a timestamp
               will be appended to the actual name).

               The default is an empty string, i.e., “”, However, when the print-immediate action
               is invoked, if the string is empty, then “XTerm” is used.

       printFileOnXError (PrintFileOnXError)
               If  xterm  exits  with an X error, e.g., your connection is broken when the server
               crashes, it can be told to write the contents of the screen to a file.  To  enable
               the  feature, set this resource to the prefix of the filename (a timestamp will be
               appended to the actual name).

               The default is an empty string, i.e., “”, which disables this  feature.   However,
               when  the  print-on-error  action  is  invoked,  if  the  string  is  empty,  then
               “XTermError” is used.

               These error codes are handled: ERROR_XERROR, ERROR_XIOERROR and ERROR_ICEERROR.

       printModeImmediate (PrintModeImmediate)
               When the print-immediate action is  invoked,  xterm  prints  the  screen  contents
               directly to a file.  You can use the printModeImmediate resource to tell it to use
               escape sequences to reconstruct the video attributes and colors.   This  uses  the
               same values as the printAttributes resource.  The default is “0”.

       printModeOnXError (PrintModeOnXError)
               Xterm implements the printFileOnXError feature using the printer feature, although
               the output is written directly to a  file.   You  can  use  the  printModeOnXError
               resource  to  tell  it to use escape sequences to reconstruct the video attributes
               and colors.  This uses the same  values  as  the  printAttributes  resource.   The
               default is “0”.

       printOptsImmediate (PrintOptsImmediate)
               Specify  the  range  of text which is printed to a file when the print-immediately
               action is invoked.

               ·   If zero (0), then this selects the current (visible  screen)  plus  the  saved
                   lines,  except  if the alternate screen is being used.  In that case, only the
                   alternate screen is selectd.

               ·   If nonzero, the bits of this resource  value  (checked  in  descending  order)
                   select the range:

                   8  selects the saved lines.

                   4  selects the alternate screen.

                   2  selects the normal screen.

                   1  selects  the  current  screen,  which can be either the normal or alternate
                      screen.

               The default is “9”, which selects the current visible  screen  plus  saved  lines,
               with no special case for the alternated screen.

       printOptsOnXError (PrintOptsOnXError)
               Specify  the  range  of  text  which  is printed to a file when the print-on-error
               action  is  invoked.   The  resource  value  is  interpreted  the   same   as   in
               printOptsImmediate.

               The  default  is  “9”,  which selects the current visible screen plus saved lines,
               with no special case for the alternated screen.

       printerAutoClose (class PrinterAutoClose)
               If “true”, xterm will close the printer (a pipe) when the application switches the
               printer offline with a Media Copy command.  The default is “false”.

       printerCommand (class PrinterCommand)
               Specifies a shell command to which xterm will open a pipe when the first MC (Media
               Copy) command is initiated.  The default is an empty string,  i.e.,  “”.   If  the
               resource value is given as an empty string, the printer is disabled.

       printerControlMode (class PrinterControlMode)
               Specifies  the  printer  control mode.  A “1” selects autoprint mode, which causes
               xterm to print a line from the screen when you move the cursor off that line  with
               a  line  feed,  form  feed  or  vertical  tab  character,  or  an autowrap occurs.
               Autoprint mode is overridden by printer controller mode (a “2”), which causes  all
               of the output to be directed to the printer.  The default is “0”.

       printerExtent (class PrinterExtent)
               Controls  whether a print page function will print the entire page (true), or only
               the portion within the scrolling margins (false).  The default is “false”.

       printerFormFeed (class PrinterFormFeed)
               Controls whether a form feed is sent to the printer at the end  of  a  print  page
               function.  The default is “false”.

       printerNewLine (class PrinterNewLine)
               Controls  whether  a  newline  is  sent  to the printer at the end of a print page
               function.  The default is “true”.

       privateColorRegisters (class privateColorRegisters)
               If true, allocate separate color registers for each sixel device  control  string,
               e.g.,  for DECGCI.  If not true, color registers are allocated only once, when the
               terminal is reset.  The default is “true”.

       quietGrab (class QuietGrab)
               Controls whether the cursor is repainted when NotifyGrab  and  NotifyUngrab  event
               types are received during change of focus.  The default is “false”.

       regisScreenSize (class RegisScreenSize)
               If  xterm  is  configured to support ReGIS graphics, this resource tells xterm the
               maximum size (in pixels) for graphics.

               Xterm accepts a special resource value  “auto”,  which  tells  xterm  to  use  the
               decTerminalID  resource  to  set the maximum size based on the hardware terminal's
               limits.  Otherwise, xterm expects the size to  be  given  as  heightxwidth,  e.g.,
               “800x1000”.

               The default resource value is “800x1000”.

       renderFont (class RenderFont)
               If  xterm  is  built  with  the  Xft  library,  this controls whether the faceName
               resource is used.  The default is “default”.

               The resource values are strings, evaluated as booleans after startup.

               false
                    disable the feature and use the normal (bitmap) font.

               true
                    startup using the TrueType  font  specified  by  the  faceName  and  faceSize
                    resource  settings.   If  there is no value for faceName, disable the feature
                    and use the normal (bitmap) font.

                    After startup, you can  still  switch  to/from  the  bitmap  font  using  the
                    “TrueType Fonts” menu entry.

               default
                    startup  using the normal (bitmap) font, but enable the “TrueType Fonts” menu
                    entry to allow runtime switching to/from TrueType fonts.

                    If there is no faceName resource set,  then  runtime  switching  to  TrueType
                    fonts  is disabled.  Xterm has a separate  compiled-in value for faceName for
                    the special case where renderFont is “default”.  That is normally “mono”.

       resizeGravity (class ResizeGravity)
               Affects the behavior  when  the  window  is  resized  to  be  taller  or  shorter.
               NorthWest  specifies  that  the top line of text on the screen stay fixed.  If the
               window is made shorter, lines are dropped from the bottom; if the window  is  made
               taller, blank lines are added at the bottom.  This is compatible with the behavior
               in R4.  SouthWest (the default) specifies that the bottom  line  of  text  on  the
               screen  stay  fixed.  If the window is made taller, additional saved lines will be
               scrolled down onto the screen; if the  window  is  made  shorter,  lines  will  be
               scrolled off the top of the screen, and the top saved lines will be dropped.

       retryInputMethod (class XtCRetryInputMethod)
               Tells  xterm  how  many  times  to  retry,  in case the input-method server is not
               responding.  This is a different issue than unsupported preedit  type,  etc.   You
               may  encounter  retries  if  your  X configuration (and its libraries) are missing
               pieces.  Setting this resource to  zero  ``0''  will  cancel  the  retrying.   The
               default is ``3''.

       reverseVideo (class ReverseVideo)
               Specifies  whether  or  not  reverse  video  should  be simulated.  The default is
               “false”.

               There are several aspects to reverse video in xterm:

               ·   The command-line -rv option tells the X libraries to  reverse  the  foreground
                   and  background colors.  Xterm's command-line options set resource values.  In
                   particular, the X Toolkit sets the reverseVideo resource when the  -rv  option
                   is used.

               ·   If  the  user  has  also  used  command-line  options  -fg  or  -bg to set the
                   foreground and background colors, xterm does not see these  options  directly.
                   Instead,  it  examines  the  resource  values  to reconstruct the command-line
                   options, and determine which of the colors is the user's intended  foreground,
                   etc.   Their  actual values are irrelevant to the reverse video function; some
                   users prefer the X defaults (black text on a white background), others  prefer
                   white text on a black background.

               ·   After  startup,  the  user  can  toggle the “Enable Reverse Video” menu entry.
                   This exchanges the current foreground  and  background  colors  of  the  VT100
                   widget,  and  repaints  the  screen.  Because of the X resource hierarchy, the
                   reverseVideo resource applies to more than the VT100 widget.

               Programs running in an xterm can also use control sequences to  enable  the  VT100
               reverse  video  mode.   These are independent of the reverseVideo resource and the
               menu entry.  Xterm exchanges the current foreground  and  background  colors  when
               drawing text affected by these control sequences.

               Other  control  sequences can alter the foreground and background colors which are
               used:

               ·   Programs can also use the ANSI color control sequences to set  the  foreground
                   and background colors.

               ·   Extensions  to  the  ANSI  color controls (such as 16-, 88- or 256-colors) are
                   treated similarly to the ANSI control.

               ·   Using other control sequences (the “dynamic colors” feature),  a  program  can
                   change the foreground and background colors.

       reverseWrap (class ReverseWrap)
               Specifies  whether  or not reverse-wraparound should be enabled.  This corresponds
               to xterm's private mode 45.  The default is “false”.

       rightScrollBar (class RightScrollBar)
               Specifies whether or not the scrollbar should be displayed  on  the  right  rather
               than the left.  The default is “false”.

       saveLines (class SaveLines)
               Specifies  the  number  of  lines  to  save  beyond  the  top of the screen when a
               scrollbar is turned on.  The default is “64”.

       scrollBar (class ScrollBar)
               Specifies whether or not the  scrollbar  should  be  displayed.   The  default  is
               “false”.

       scrollBarBorder (class ScrollBarBorder)
               Specifies  the  width of the scrollbar border.  Note that this is drawn to overlap
               the border of the xterm window.  Modifying the scrollbar's border affects only the
               line between the VT100 widget and the scrollbar.  The default value is 1.

       scrollKey (class ScrollCond)
               Specifies  whether  or not pressing a key should automatically cause the scrollbar
               to go to the bottom of the scrolling region.  This corresponds to xterm's  private
               mode 1011.  The default is “false”.

       scrollLines (class ScrollLines)
               Specifies  the number of lines that the scroll-back and scroll-forw actions should
               use as a default.  The default value is 1.

       scrollTtyOutput (class ScrollCond)
               Specifies whether or not output to the terminal  should  automatically  cause  the
               scrollbar to go to the bottom of the scrolling region.  The default is “true”.

       selectToClipboard (class SelectToClipboard)
               Tells  xterm  whether  to  use  the  PRIMARY or CLIPBOARD for SELECT tokens in the
               selection mechanism.  The set-select action can change this at  runtime,  allowing
               the  user  to  work  with  programs that handle only one of these mechanisms.  The
               default is “false”, which tells it to use PRIMARY.

       shiftFonts (class ShiftFonts)
               Specifies whether to enable the actions  larger-vt-font()  and  smaller-vt-font(),
               which  are  normally  bound to the shifted KP_Add and KP_Subtract.  The default is
               “true”.

       showBlinkAsBold (class ShowBlinkAsBold)
               Tells xterm whether to display text with blink-attribute the  same  as  bold.   If
               xterm  has  not  been  configured to support blinking text, the default is “true”,
               which corresponds to older versions of xterm, otherwise the default is “false”.

       showMissingGlyphs (class ShowMissingGlyphs)
               Tells xterm whether to display a box outlining places where a character  has  been
               used that the font does not represent.  The default is “false”.

       showWrapMarks (class ShowWrapMarks)
               For  debugging xterm and applications that may manipulate the wrapped-line flag by
               writing text at the right margin, show a mark on the  right  inner-border  of  the
               window.  The mark shows which lines have the flag set.

       signalInhibit (class SignalInhibit)
               Specifies  whether  or  not  the  entries  in  the “Main Options” menu for sending
               signals to xterm should be disallowed.  The default is “false”.

       sixelScrolling (class SixelScrolling)
               If true, graphics scroll up one line at a time when sixels would be  written  past
               the bottom line on the window.  The default is “false”.

       tekGeometry (class Geometry)
               Specifies  the  preferred  size and position of the Tektronix window.  There is no
               default for this resource.

       tekInhibit (class TekInhibit)
               Specifies whether or not the escape sequence to enter  Tektronix  mode  should  be
               ignored.  The default is “false”.

       tekSmall (class TekSmall)
               Specifies  whether  or  not the Tektronix mode window should start in its smallest
               size if no explicit geometry is given.  This  is  useful  when  running  xterm  on
               displays with small screens.  The default is “false”.

       tekStartup (class TekStartup)
               Specifies  whether or not xterm should start up in Tektronix mode.  The default is
               “false”.

       tiXtraScroll (class TiXtraScroll)
               Specifies whether xterm should scroll to a new page when processing the ti termcap
               entry,  i.e.,  the  private  modes  47,  1047  or 1049.  This is only in effect if
               titeInhibit is “true”, because the intent of this option is to provide  a  picture
               of  the full-screen application's display on the scrollback without wiping out the
               text that would be shown before the application was initialized.  The default  for
               this resource is “false”.

       titeInhibit (class TiteInhibit)
               Specifies  whether  or  not xterm should remove ti and te termcap entries (used to
               switch between alternate screens on startup of many screen-oriented programs) from
               the  TERMCAP  string.  If set, xterm also ignores the escape sequence to switch to
               the alternate screen.  Xterm supports terminfo  in  a  different  way,  supporting
               composite  control  sequences  (also  known  as private modes) 1047, 1048 and 1049
               which have the same effect as the original 47 control sequence.  The  default  for
               this resource is “false”.

       titleModes (class TitleModes)
               Tells xterm whether to accept or return window- and icon-labels in ISO-8859-1 (the
               default) or UTF-8.  Either can be encoded in hexadecimal.  The  default  for  this
               resource is “0”.

               Each  bit (bit “0” is 1, bit “1” is 2, etc.)  corresponds to one of the parameters
               set by the title modes control sequence:

               0    Set window/icon labels using hexadecimal

               1    Query window/icon labels using hexadecimal

               2    Set window/icon labels using UTF-8 (overrides utf8Title resource).

               3    Query window/icon labels using UTF-8

       translations (class Translations)
               Specifies the key and button bindings for menus, selections, “programmed strings”,
               etc.   The  translations resource, which provides much of xterm's configurability,
               is a feature of the X Toolkit Intrinsics library (Xt).  See the ACTIONS section.

       trimSelection (class TrimSelection)
               If you set highlightSelection, you can see the text which is  selected,  including
               any  trailing  spaces.   Clearing  the  screen  (or  a  line) resets it to a state
               containing no spaces.  Some lines may contain trailing spaces when an  application
               writes them to the screen.  However, you may not wish to paste lines with trailing
               spaces.  If this resource is true, xterm will trim trailing spaces from text which
               is  selected.   It does not affect spaces which result in a wrapped line, nor will
               it trim the trailing newline from your selection.  The default is “false”.

       underLine (class UnderLine)
               This specifies whether  or  not  text  with  the  underline  attribute  should  be
               underlined.   It  may be desirable to disable underlining when color is being used
               for the underline attribute.  The default is “true”.

       useClipping (class UseClipping)
               Tell xterm whether to use clipping to keep from producing dots  outside  the  text
               drawing  area.   Originally  used to work around for overstriking effects, this is
               also needed to work with some incorrectly-sized fonts.  The default is “true”.

       utf8 (class Utf8)
               This specifies whether xterm will run in UTF-8 mode.  If you  set  this  resource,
               xterm  also sets the wideChars resource as a side-effect.  The resource can be set
               via the menu entry “UTF-8 Encoding”.  The default is “default”.

               Xterm accepts either a keyword (ignoring case) or the number shown in parentheses:

               false (0)
                  UTF-8 mode is initially off.  The command-line option +u8 sets the resource  to
                  this value.  Escape sequences for turning UTF-8 mode on/off are allowed.

               true (1)
                  UTF-8 mode is initially on.  Escape sequences for turning UTF-8 mode on/off are
                  allowed.

               always (2)
                  The command-line option -u8 sets the resource to this value.  Escape  sequences
                  for turning UTF-8 mode on/off are ignored.

               default (3)
                  This is the default value of the resource.  It is changed during initialization
                  depending on whether the locale resource was set, to false (0) or  always  (2).
                  See the locale resource for additional discussion of non-UTF-8 locales.

               If  you  want to set the value of utf8, it should be in this range.  Other nonzero
               values are treated the same as “1”, i.e., UTF-8 mode is initially on,  and  escape
               sequences for turning UTF-8 mode on/off are allowed.

       utf8Fonts (class Utf8Fonts)
               See  the discussion of the locale resource.  This specifies whether xterm will use
               UTF-8 fonts specified via resource patterns  such  as  “*vt100.utf8Fonts.font”  or
               normal (ISO-8859-1) fonts via patterns such as “*vt100.font”.  The resource can be
               set via the menu entry “UTF-8 Fonts”.  The default is “default”.

               Xterm accepts either a keyword (ignoring case) or the number shown in parentheses:

               false (0)
                      Use the ISO-8859-1 fonts.  The menu entry is enabled, allowing  the  choice
                      of fonts to be changed at runtime.

               true (1)
                      Use  the  UTF-8  fonts.   The menu entry is enabled, allowing the choice of
                      fonts to be changed at runtime.

               always (2)
                      Always use the UTF-8 fonts.  This also disables the menu entry.

               default (3)
                      At startup, the resource  is  set  to  true  or  false,  according  to  the
                      effective value of the utf8 resource.

       utf8Latin1 (class Utf8Latin1)
               If  true,  allow an ISO-8859-1 normal font to be combined with an ISO-10646-1 font
               if the latter is given via the -fw option or  its  corresponding  resource  value.
               The default is “false”.

       utf8SelectTypes (class Utf8SelectTypes)
               Override  xterm's  default selection target list (see SELECT/PASTE) for selections
               in wide-character (UTF-8) mode.  The default is an empty string, i.e.,  “”,  which
               does not override anything.

       utf8Title (class Utf8Title)
               Applications  can  set xterm's title by writing a control sequence.  Normally this
               control sequence follows  the  VT220  convention,  which  encodes  the  string  in
               ISO-8859-1  and  allows  for an 8-bit string terminator.  If xterm is started in a
               UTF-8 locale, it translates the ISO-8859-1 string to UTF-8  to  work  with  the  X
               libraries which assume the string is UTF-8.

               However, some users may wish to write a title string encoded in UTF-8.  The window
               manager is responsible for drawing window titles.  Some window managers (not  all)
               support  UTF-8  encoding  of  window titles.  Set this resource to “true” to allow
               UTF-8 encoded title strings.  That cancels  the  translation  to  UTF-8,  allowing
               UTF-8 strings to be displayed as is.

               This  feature  is available as a menu entry, since it is related to the particular
               applications you are running within xterm.  You can also use  a  control  sequence
               (see the discussion of “Title Modes” in the control sequences document), to set an
               equivalent flag.  The titleModes resource sets the  same  value,  which  overrides
               this resource.

               The default is “false”.

       veryBoldColors (class VeryBoldColors)
               Specifies  whether  to  combine video attributes with colors specified by colorBD,
               colorBL, colorIT, colorRV, and colorUL.  The resource value is the sum  of  values
               for each attribute:
                 1 for reverse,
                 2 for underline,
                 4 for bold,
                 8 for blink, and
                 512 for italic

               The default is “0”.

       visualBell (class VisualBell)
               Specifies whether or not a visible bell (i.e., flashing) should be used instead of
               an audible bell when Control-G is received.  The default is “false”,  which  tells
               xterm to use an audible bell.

       visualBellDelay (class VisualBellDelay)
               Number  of  milliseconds  to delay when displaying a visual bell.  Default is 100.
               If set to zero, no visual bell  is  displayed.   This  is  useful  for  very  slow
               displays, e.g., an LCD display on a laptop.

       visualBellLine (class VisualBellLine)
               Specifies  whether  to  flash  only the current line when displaying a visual bell
               rather than flashing the entire screen: The default is “false”, which tells  xterm
               to flash the entire screen.

       vt100Graphics (class VT100Graphics)
               This  specifies  whether  xterm  will  interpret  VT100  graphic  character escape
               sequences while in UTF-8 mode.  The default is  “true”,  to  provide  support  for
               various legacy applications.

       wideBoldFont (class WideBoldFont)
               This  option  specifies  the  font  to  be used for displaying bold wide text.  By
               default, it will attempt to use a font twice as wide as the font that will be used
               to  draw  bold  text.   If  no  double-width  font is found, it will improvise, by
               stretching the bold font.

       wideChars (class WideChars)
               Specifies if xterm  should  respond  to  control  sequences  that  process  16-bit
               characters.  The default is “false”.

       wideFont (class WideFont)
               This  option  specifies the font to be used for displaying wide text.  By default,
               it will attempt to use a font twice as wide as the font that will be used to  draw
               normal  text.   If no double-width font is found, it will improvise, by stretching
               the normal font.

       ximFont (class XimFont)
               This option specifies the font to be used for displaying the preedit string in the
               “OverTheSpot” input method.

               In  “OverTheSpot” preedit type, the preedit (preconversion) string is displayed at
               the position of the cursor.  It is the XIM server's responsibility to display  the
               preedit string.  The XIM client must inform the XIM server of the cursor position.
               For best results, the preedit  string  must  be  displayed  with  a  proper  font.
               Therefore,  xterm  informs  the  XIM  server  of  the proper font.  The font is be
               supplied by a "fontset", whose default value is “*”.  This matches every font, the
               X  library automatically chooses fonts with proper charsets.  The ximFont resource
               is provided to override this default font setting.

   Tek4014 Widget Resources
       The following resources are specified as part  of  the  tek4014  widget  (class  Tek4014).
       These are specified by patterns such as “XTerm.tek4014.NAME”:

       font2 (class Font)
               Specifies font number 2 to use in the Tektronix window.

       font3 (class Font)
               Specifies font number 3 to use in the Tektronix window.

       fontLarge (class Font)
               Specifies the large font to use in the Tektronix window.

       fontSmall (class Font)
               Specifies the small font to use in the Tektronix window.

       ginTerminator (class GinTerminator)
               Specifies  what  character(s)  should  follow  a GIN report or status report.  The
               possibilities are “none”, which sends no terminating characters,  “CRonly”,  which
               sends CR, and “CR&EOT”, which sends both CR and EOT.  The default is “none”.

       height (class Height)
               Specifies the height of the Tektronix window in pixels.

       initialFont (class InitialFont)
               Specifies which of the four Tektronix fonts to use initially.  Values are the same
               as for the set-tek-text action.  The default is “large”.

       width (class Width)
               Specifies the width of the Tektronix window in pixels.

   Menu Resources
       The resources  that  may  be  specified  for  the  various  menus  are  described  in  the
       documentation  for  the  Athena SimpleMenu widget.  The name and classes of the entries in
       each of the menus are listed below.  Resources named “lineN”  where  N  is  a  number  are
       separators with class SmeLine.

       As  with all X resource-based widgets, the labels mentioned are customary defaults for the
       application.

       The Main Options menu (widget name mainMenu) has the following entries:

       toolbar (class SmeBSB)
               This entry invokes the set-toolbar(toggle) action.

       securekbd (class SmeBSB)
               This entry invokes the secure() action.

       allowsends (class SmeBSB)
               This entry invokes the allow-send-events(toggle) action.

       redraw (class SmeBSB)
               This entry invokes the redraw() action.

       logging (class SmeBSB)
               This entry invokes the logging(toggle) action.

       print-immediate (class SmeBSB)
               This entry invokes the print-immediate() action.

       print-on-error (class SmeBSB)
               This entry invokes the print-on-error() action.

       print (class SmeBSB)
               This entry invokes the print() action.

       print-redir (class SmeBSB)
               This entry invokes the print-redir() action.

       8-bit-control (class SmeBSB)
               This entry invokes the set-8-bit-control(toggle) action.

       backarrow key (class SmeBSB)
               This entry invokes the set-backarrow(toggle) action.

       num-lock (class SmeBSB)
               This entry invokes the set-num-lock(toggle) action.

       alt-esc (class SmeBSB)
               This entry invokes the alt-sends-escape(toggle) action.

       meta-esc (class SmeBSB)
               This entry invokes the meta-sends-escape(toggle) action.

       delete-is-del (class SmeBSB)
               This entry invokes the delete-is-del(toggle) action.

       oldFunctionKeys (class SmeBSB)
               This entry invokes the old-function-keys(toggle) action.

       hpFunctionKeys (class SmeBSB)
               This entry invokes the hp-function-keys(toggle) action.

       scoFunctionKeys (class SmeBSB)
               This entry invokes the sco-function-keys(toggle) action.

       sunFunctionKeys (class SmeBSB)
               This entry invokes the sun-function-keys(toggle) action.

       sunKeyboard (class SmeBSB)
               This entry invokes the sunKeyboard(toggle) action.

       suspend (class SmeBSB)
               This entry invokes the  send-signal(tstp)  action  on  systems  that  support  job
               control.

       continue (class SmeBSB)
               This  entry  invokes  the  send-signal(cont)  action  on  systems that support job
               control.

       interrupt (class SmeBSB)
               This entry invokes the send-signal(int) action.

       hangup (class SmeBSB)
               This entry invokes the send-signal(hup) action.

       terminate (class SmeBSB)
               This entry invokes the send-signal(term) action.

       kill (class SmeBSB)
               This entry invokes the send-signal(kill) action.

       quit (class SmeBSB)
               This entry invokes the quit() action.

       The VT Options menu (widget name vtMenu) has the following entries:

       scrollbar (class SmeBSB)
               This entry invokes the set-scrollbar(toggle) action.

       jumpscroll (class SmeBSB)
               This entry invokes the set-jumpscroll(toggle) action.

       reversevideo (class SmeBSB)
               This entry invokes the set-reverse-video(toggle) action.

       autowrap (class SmeBSB)
               This entry invokes the set-autowrap(toggle) action.

       reversewrap (class SmeBSB)
               This entry invokes the set-reversewrap(toggle) action.

       autolinefeed (class SmeBSB)
               This entry invokes the set-autolinefeed(toggle) action.

       appcursor (class SmeBSB)
               This entry invokes the set-appcursor(toggle) action.

       appkeypad (class SmeBSB)
               This entry invokes the set-appkeypad(toggle) action.

       scrollkey (class SmeBSB)
               This entry invokes the set-scroll-on-key(toggle) action.

       scrollttyoutput (class SmeBSB)
               This entry invokes the set-scroll-on-tty-output(toggle) action.

       allow132 (class SmeBSB)
               This entry invokes the set-allow132(toggle) action.

       cursesemul (class SmeBSB)
               This entry invokes the set-cursesemul(toggle) action.

       visualbell (class SmeBSB)
               This entry invokes the set-visualbell(toggle) action.

       bellIsUrgent (class SmeBSB)
               This entry invokes the set-bellIsUrgent(toggle) action.

       poponbell (class SmeBSB)
               This entry invokes the set-poponbell(toggle) action.

       cursorblink (class SmeBSB)
               This entry invokes the set-cursorblink(toggle) action.

       titeInhibit (class SmeBSB)
               This entry invokes the set-titeInhibit(toggle) action.

       activeicon (class SmeBSB)
               This entry toggles active icons on and off  if  this  feature  was  compiled  into
               xterm.   It  is enabled only if xterm was started with the command line option +ai
               or the activeIcon resource is set to “true”.

       softreset (class SmeBSB)
               This entry invokes the soft-reset() action.

       hardreset (class SmeBSB)
               This entry invokes the hard-reset() action.

       clearsavedlines (class SmeBSB)
               This entry invokes the clear-saved-lines() action.

       tekshow (class SmeBSB)
               This entry invokes the set-visibility(tek,toggle) action.

       tekmode (class SmeBSB)
               This entry invokes the set-terminal-type(tek) action.

       vthide (class SmeBSB)
               This entry invokes the set-visibility(vt,off) action.

       altscreen (class SmeBSB)
               This entry invokes the set-altscreen(toggle) action.

       sixelScrolling (class SmeBSB)
               This entry invokes the set-sixel-scrolling(toggle) action.

       The VT Fonts menu (widget name fontMenu) has the following entries:

       fontdefault (class SmeBSB)
               This entry invokes the set-vt-font(d) action, setting  the  font  using  the  font
               (default) resource, e.g., “Default” in the menu.

       font1 (class SmeBSB)
               This  entry  invokes  the  set-vt-font(1) action, setting the font using the font1
               resource, e.g., “Unreadable” in the menu.

       font2 (class SmeBSB)
               This entry invokes the set-vt-font(2) action, setting the  font  using  the  font2
               resource, e.g., “Tiny” in the menu.

       font3 (class SmeBSB)
               This  entry  invokes  the  set-vt-font(3) action, setting the font using the font3
               resource, e.g., “Small” in the menu.

       font4 (class SmeBSB)
               This entry invokes the set-vt-font(4) action, letting the  font  using  the  font4
               resource, e.g., “Medium” in the menu.

       font5 (class SmeBSB)
               This  entry  invokes  the  set-vt-font(5) action, letting the font using the font5
               resource, e.g., “Large” in the menu.

       font6 (class SmeBSB)
               This entry invokes the set-vt-font(6) action, letting the  font  using  the  font6
               resource, e.g., “Huge” in the menu.

       fontescape (class SmeBSB)
               This entry invokes the set-vt-font(e) action.

       fontsel (class SmeBSB)
               This entry invokes the set-vt-font(s) action.

       font-linedrawing (class SmeBSB)
               This entry invokes the set-font-linedrawing(s) action.

       font-packed (class SmeBSB)
               This entry invokes the set-font-packed(s) action.

       font-doublesize (class SmeBSB)
               This entry invokes the set-font-doublesize(s) action.

       render-font (class SmeBSB)
               This entry invokes the set-render-font(s) action.

       utf8-mode (class SmeBSB)
               This entry invokes the set-utf8-mode(s) action.

       utf8-title (class SmeBSB)
               This entry invokes the set-utf8-title(s) action.

       The TEK Options menu (widget name tekMenu) has the following entries:

       tektextlarge (class SmeBSB)
               This entry invokes the set-tek-text(large) action.

       tektext2 (class SmeBSB)
               This entry invokes the set-tek-text(2) action.

       tektext3 (class SmeBSB)
               This entry invokes the set-tek-text(3) action.

       tektextsmall (class SmeBSB)
               This entry invokes the set-tek-text(small) action.

       tekpage (class SmeBSB)
               This entry invokes the tek-page() action.

       tekreset (class SmeBSB)
               This entry invokes the tek-reset() action.

       tekcopy (class SmeBSB)
               This entry invokes the tek-copy() action.

       vtshow (class SmeBSB)
               This entry invokes the set-visibility(vt,toggle) action.

       vtmode (class SmeBSB)
               This entry invokes the set-terminal-type(vt) action.

       tekhide (class SmeBSB)
               This entry invokes the set-visibility(tek,toggle) action.

   Scrollbar Resources
       The following resources are useful when specified for the Athena Scrollbar widget:

       thickness (class Thickness)
               Specifies the width in pixels of the scrollbar.

       background (class Background)
               Specifies the color to use for the background of the scrollbar.

       foreground (class Foreground)
               Specifies  the  color  to use for the foreground of the scrollbar.  The “thumb” of
               the scrollbar is a simple checkerboard pattern alternating pixels  for  foreground
               and background color.

POINTER USAGE

       Once  the  VT102 window is created, xterm allows you to select text and copy it within the
       same or other windows.

   Selection
       The selection functions are invoked when the pointer buttons are used with  no  modifiers,
       and  when  they  are used with the “shift” key.  The assignment of the functions described
       below to keys and buttons may be changed through the resource database; see ACTIONS below.

       Pointer button one (usually left) is used to save text into  the  cut  buffer.   Move  the
       cursor  to beginning of the text, and then hold the button down while moving the cursor to
       the end of the region and releasing the button.  The selected text is highlighted  and  is
       saved in the global cut buffer and made the PRIMARY selection when the button is released.
       Normally (but see the discussion of on2Clicks, etc):

       ·   Double-clicking selects by words.

       ·   Triple-clicking selects by lines.

       ·   Quadruple-clicking goes back to characters, etc.

       Multiple-click is determined by the time from button up to button down, so you can  change
       the  selection  unit  in  the  middle of a selection.  Logical words and lines selected by
       double- or triple-clicking may wrap across more than one screen line if lines were wrapped
       by  xterm  itself rather than by the application running in the window.  If the key/button
       bindings specify that an X selection is to be made, xterm will  leave  the  selected  text
       highlighted for as long as it is the selection owner.

       Pointer  button two (usually middle) “types” (pastes) the text from the PRIMARY selection,
       if any, otherwise from the cut buffer, inserting it as keyboard input.

       Pointer button three (usually right) extends the  current  selection.   (Without  loss  of
       generality, you can swap “right” and “left” everywhere in the rest of this paragraph.)  If
       pressed  while  closer  to  the  right  edge  of  the  selection   than   the   left,   it
       extends/contracts the right edge of the selection.  If you contract the selection past the
       left edge of the selection, xterm assumes you really meant the  left  edge,  restores  the
       original  selection,  then  extends/contracts  the  left edge of the selection.  Extension
       starts in the selection unit mode that the last selection or extension was  performed  in;
       you can multiple-click to cycle through them.

       By  cutting  and pasting pieces of text without trailing new lines, you can take text from
       several places in different windows and form a command to the shell, for example, or  take
       output  from  a  program  and  insert it into your favorite editor.  Since cut buffers are
       globally shared among different applications, you  may  regard  each  as  a  “file”  whose
       contents you know.  The terminal emulator and other text programs should be treating it as
       if it were a text file, i.e., the text is delimited by new lines.

   Scrolling
       The scroll region displays the position and amount of text currently showing in the window
       (highlighted) relative to the amount of text actually saved.  As more text is saved (up to
       the maximum), the size of the highlighted area decreases.

       Clicking button one with the pointer in the scroll region moves the adjacent line  to  the
       top of the display window.

       Clicking  button  three  moves  the  top  line  of  the display window down to the pointer
       position.

       Clicking button two moves the display to a position in the saved text that corresponds  to
       the pointer's position in the scrollbar.

   Tektronix Pointer
       Unlike the VT102 window, the Tektronix window does not allow the copying of text.  It does
       allow Tektronix GIN mode, and in this mode the cursor will  change  from  an  arrow  to  a
       cross.   Pressing  any  key  will  send  that  key and the current coordinate of the cross
       cursor.  Pressing button one, two, or three will return the letters  “l”,  “m”,  and  “r”,
       respectively.   If  the  “shift”  key  is  pressed  when  a pointer button is pressed, the
       corresponding upper case letter is sent.  To distinguish a pointer button from a key,  the
       high bit of the character is set (but this is bit is normally stripped unless the terminal
       mode is RAW; see tty(4) for details).

SELECT/PASTE

       X clients provide select and paste support by  responding  to  requests  conveyed  by  the
       server.

   Primary
       When  configured  to  use  the  primary  selection,  (the  default)  xterm can provide the
       selection data in ways which help to  retain  character  encoding  information  as  it  is
       pasted.

       A  user “selects” text on xterm, which highlights the selected text.  A subsequent “paste”
       to another client forwards a request to the client owning the selection.   If  xterm  owns
       the  primary  selection, it makes the data available in the form of one or more “selection
       targets”.  If it does not own the primary selection,  e.g.,  if  it  has  released  it  or
       another  client  has  asserted  ownership, it relies on cut-buffers to pass the data.  But
       cut-buffers handle only ISO-8859-1 data (officially - some clients ignore the rules).

   Clipboard
       When configured to use the clipboard (see resource selectToClipboard),  the  problem  with
       persistence  of  ownership  is  bypassed.  Otherwise, there is no difference regarding the
       data which can be passed via selection.

       The PRIMARY token  is  a  standard  X  feature,  documented  in  the  ICCCM  (Inter-Client
       Communication Conventions Manual), which states

              The  selection  named by the atom PRIMARY is used for all commands that take only a
              single argument and is the principal means of communication  between  clients  that
              use the selection mechanism.

       However,  many  applications  use  CLIPBOARD in imitation of other windowing systems.  The
       selectToClipboard resource (and corresponding menu entry Select  to  Clipboard)  introduce
       the  SELECT  token  (known  only to xterm) which chooses between the PRIMARY and CLIPBOARD
       tokens.

       Without using this feature, one can use workarounds such as the xclip program to show  the
       contents of the X clipboard within an xterm window.

   Selection Targets
       The different types of data which are passed depend on what the receiving client asks for.
       These are termed selection targets.

       When asking for the selection data, xterm tries the following types in this order:

              UTF8_STRING
                   This is an XFree86 extension, which denotes that the data is encoded in UTF-8.
                   When  xterm is built with wide-character support, it both accepts and provides
                   this type.

              TEXT the text is in the encoding which corresponds to your current locale.

              COMPOUND_TEXT
                   this is a format for multiple character set data, such as multi-lingual  text.
                   It can store UTF-8 data as a special case.

              STRING
                   This is Latin 1 (ISO-8859-1) data.

       The  middle  two  (TEXT  and  COMPOUND_TEXT)  are  added  if  xterm is configured with the
       i18nSelections resource set to “true”.

       UTF8_STRING is preferred (therefore first in the list) since xterm stores text as  Unicode
       data  when  running  in  wide-character  mode, and no translation is needed.  On the other
       hand, TEXT and COMPOUND_TEXT may require translation.  If the translation  is  incomplete,
       they  will  insert X's “defaultString” whose value cannot be set, and may simply be empty.
       Xterm's defaultString resource specifies the string to use for incomplete translations  of
       the UTF8_STRING.

       You can alter the types which xterm tries using the eightBitSelectTypes or utf8SelectTypes
       resources.  For instance, you might have some specific locale setting which does  not  use
       UTF-8  encoding.   The  resource value is a comma-separated list of the selection targets,
       which consist of the names shown.  You can  use  the  special  name  I18N  to  denote  the
       optional  inclusion  of  TEXT and COMPOUND_TEXT.  The names are matched ignoring case, and
       can be abbreviated.  The default list can be expressed in several ways, e.g.,

              UTF8_STRING,I18N,STRING
              utf8,i18n,string
              u,i,s

MENUS

       Xterm has four menus, named mainMenu, vtMenu, fontMenu, and tekMenu.  Each  menu  pops  up
       under  the  correct  combinations  of  key  and button presses.  Each menu is divided into
       sections, separated by a horizontal line.  Some menu entries correspond to modes that  can
       be  altered.  A check mark appears next to a mode that is currently active.  Selecting one
       of these modes toggles its state.  Other menu entries are commands; selecting one of these
       performs the indicated function.

       All  of  the  menu  entries correspond to X actions.  In the list below, the menu label is
       shown followed by the action's name in parenthesis.

   Main Options
       The xterm mainMenu pops up when the “control” key and pointer button one are pressed in  a
       window.   This  menu  contains  items  that apply to both the VT102 and Tektronix windows.
       There are several sections:

       Commands for managing X events:

              Toolbar
                     Clicking on the “Toolbar” menu entry hides the toolbar if it is visible, and
                     shows it if it is not.

              Secure Keyboard (securekbd)
                     The  Secure  Keyboard  mode  is  helpful  when  typing in passwords or other
                     sensitive data in an unsecure environment; see SECURITY below (but read  the
                     limitations carefully).

              Allow SendEvents (allowsends)
                     Specifies whether or not synthetic key and button events generated using the
                     X protocol SendEvent request  should  be  interpreted  or  discarded.   This
                     corresponds to the allowSendEvents resource.

              Redraw Window (redraw)
                     Forces the X display to repaint; useful in some environments.

       Commands for capturing output:

              Log to File (logging)
                     Captures text sent to the screen in a logfile, as in the -l logging option.

              Print-All Immediately
                     Invokes  the  print-immediate action, sending the text of the current window
                     directly   to   a   file,   as   specified   by   the    printFileImmediate,
                     printModeImmediate and printOptsImmediate resources.

              Print-All on Error
                     Invokes  the  print-on-error action, which toggles a flag telling xterm that
                     if it exits with an X error, to send the text of the current window directly
                     to  a  file,  as  specified  by  the  printFileXError,  printModeXError  and
                     printOptsXError resources.

              Print Window (print)
                     Sends  the  text  of  the  current  window  to  the  program  given  in  the
                     printerCommand resource.

              Redirect to Printer (print-redir)
                     This  sets  the  printerControlMode to 0 or 2.  You can use this to turn the
                     printer on as if an application had sent the appropriate  control  sequence.
                     It  is  also useful for switching the printer off if an application turns it
                     on without resetting the print control mode.

       Modes for setting keyboard style:

              8-Bit Controls (8-bit-control)
                     Enabled for VT220 emulation, this controls whether  xterm  will  send  8-bit
                     control  sequences rather than using 7-bit (ASCII) controls, e.g., sending a
                     byte in the range 128-159 rather than the escape  character  followed  by  a
                     second byte.  Xterm always interprets both 8-bit and 7-bit control sequences
                     (see the  document  Xterm  Control  Sequences).   This  corresponds  to  the
                     eightBitControl resource.

              Backarrow Key (BS/DEL) (backarrow key)
                     Modifies  the  behavior  of  the  backarrow key, making it transmit either a
                     backspace  (8)  or  delete  (127)  character.   This  corresponds   to   the
                     backarrowKey resource.

              Alt/NumLock Modifiers (num-lock)
                     Controls  the treatment of Alt- and NumLock-key modifiers.  This corresponds
                     to the numLock resource.

              Meta Sends Escape (meta-esc)
                     Controls whether Meta keys are converted into a two-character sequence  with
                     the   character   itself   preceded   by   ESC.   This  corresponds  to  the
                     metaSendsEscape resource.

              Delete is DEL (delete-is-del)
                     Controls whether the Delete key on the editing keypad should send DEL  (127)
                     or  the  VT220-style  Remove  escape  sequence.   This  corresponds  to  the
                     deleteIsDEL resource.

              Old Function-Keys (oldFunctionKeys)

              HP Function-Keys (hpFunctionKeys)

              SCO Function-Keys (scoFunctionKeys)

              Sun Function-Keys (sunFunctionKeys)

              VT220 Keyboard (sunKeyboard)
                     These act as a radio-button, selecting one style for  the  keyboard  layout.
                     It   corresponds   to   more   than   one   resource  setting:  sunKeyboard,
                     sunFunctionKeys, scoFunctionKeys and hpFunctionKeys.

       Commands for process signalling:

              Send STOP Signal (suspend)

              Send CONT Signal (continue)

              Send INT Signal (interrupt)

              Send HUP Signal (hangup)

              Send TERM Signal (terminate)

              Send KILL Signal (kill)
                     These send the SIGTSTP, SIGCONT, SIGINT, SIGHUP, SIGTERM and SIGKILL signals
                     respectively,  to  the  process  group  of  the  process running under xterm
                     (usually the shell).  The SIGCONT function is especially useful if the  user
                     has accidentally typed CTRL-Z, suspending the process.

              Quit (quit)
                     Stop processing X events except to support the -hold option, and then send a
                     SIGHUP signal to the process  group  of  the  process  running  under  xterm
                     (usually the shell).

   VT Options
       The  vtMenu sets various modes in the VT102 emulation, and is popped up when the “control”
       key and pointer button two are pressed in the VT102 window.

       VT102/VT220 Modes:

              Enable Scrollbar (scrollbar)
                     Enable (or disable) the scrollbar.  This corresponds to the -sb  option  and
                     the scrollBar resource.

              Enable Jump Scroll (jumpscroll)
                     Enable  (or  disable) jump scrolling.  This corresponds to the -j option and
                     the jumpScroll resource.

              Enable Reverse Video (reversevideo)
                     Enable (or disable) reverse-video.  This corresponds to the -rv  option  and
                     the reverseVideo resource.

              Enable Auto Wraparound (autowrap)
                     Enable (or disable) auto-wraparound.  This corresponds to the -aw option and
                     the autoWrap resource.

              Enable Reverse Wraparound (reversewrap)
                     Enable (or disable) reverse wraparound.  This corresponds to the -rw  option
                     and the reverseWrap resource.

              Enable Auto Linefeed (autolinefeed)
                     Enable  (or  disable)  auto-linefeed.  This is the VT102 NEL function, which
                     causes the emulator to emit a linefeed after each carriage return.  There is
                     no corresponding command-line option or resource setting.

              Enable Application Cursor Keys (appcursor)
                     Enable  (or  disable)  application  cursor  keys.   This  corresponds to the
                     appcursorDefault resource.  There is no corresponding command-line option.

              Enable Application Keypad (appkeypad)
                     Enable (or disable)  application  keypad  keys.   This  corresponds  to  the
                     appkeypadDefault resource.  There is no corresponding command-line option.

              Scroll to Bottom on Key Press (scrollkey)
                     Enable  (or  disable)  scrolling  to the bottom of the scrolling region on a
                     keypress.  This corresponds to the -sk option and the scrollKey resource.

                     As a special case, the  XON  /  XOFF  keys  (control/S  and  control/Q)  are
                     ignored.

              Scroll to Bottom on Tty Output (scrollttyoutput)
                     Enable  (or  disable)  scrolling  to  the  bottom of the scrolling region on
                     output to the  terminal.   This  corresponds  to  the  -si  option  and  the
                     scrollTtyOutput resource.

              Allow 80/132 Column Switching (allow132)
                     Enable  (or disable) switching between 80 and 132 columns.  This corresponds
                     to the -132 option and the c132 resource.

              Keep Selection (keepSelection)
                     Tell xterm whether to disown the selection when it  stops  highlighting  it,
                     e.g.,  when an application modifies the display so that it no longer matches
                     the text which has been highlighted.  As long as xterm continues to own  the
                     selection,  it  can  provide  the  corresponding  text  to other clients via
                     cut/paste.  This corresponds to the keepSelection  resource.   There  is  no
                     corresponding command-line option.

              Select to Clipboard (selectToClipboard)
                     Tell  xterm whether to use the PRIMARY or CLIPBOARD for SELECT tokens in the
                     translations resource which maps keyboard and mouse actions to  select/paste
                     actions.   This  corresponds to the selectToClipboard resource.  There is no
                     corresponding command-line option.

              Enable Visual Bell (visualbell)
                     Enable (or disable) visible bell (i.e.,  flashing)  instead  of  an  audible
                     bell.  This corresponds to the -vb option and the visualBell resource.

              Enable Bell Urgency (bellIsUrgent)
                     Enable  (or disable) Urgency window manager hint when Control-G is received.
                     This corresponds to the bellIsUrgent resource.

              Enable Pop on Bell (poponbell)
                     Enable (or disable) raising of the window when Control-G is received.   This
                     corresponds to the -pop option and the popOnBell resource.

              Enable Blinking Cursor (cursorblink)
                     Enable  (or  disable)  the blinking-cursor feature.  This corresponds to the
                     -bc option and the cursorBlink resource.  There is also an  escape  sequence
                     (see  the  document Xterm Control Sequences).  The menu entry and the escape
                     sequence states are XOR'd: if both are enabled, the cursor will  not  blink,
                     if only one is enabled, the cursor will blink.

              Enable Alternate Screen Switching (titeInhibit)
                     Enable  (or  disable)  switching  between  the normal and alternate screens.
                     This corresponds to the titeInhibit resource.   There  is  no  corresponding
                     command-line option.

              Enable Active Icon (activeicon)
                     Enable  (or  disable)  the active-icon feature.  This corresponds to the -ai
                     option and the activeIcon resource.

              Sixel Scrolling (sixelScrolling)
                     When enabled, sixel graphics are  positioned  at  the  current  text  cursor
                     location,  scroll  the image vertically if larger than the screen, and leave
                     the text cursor at the start of the next complete line after the image  when
                     returning to text mode (this is the default).  When disabled, sixel graphics
                     are positioned at the upper left of the  screen,  are  cropped  to  fit  the
                     screen, and do not affect the text cursor location.  This corresponds to the
                     sixelScrolling resource.  There is no corresponding command-line option.

              Private Color Registers (privateColorRegisters)
                     When enabled, each graphic image uses a separate set of color registers,  so
                     that  it  essentially has a private palette (this is the default).  If it is
                     not set, all graphics images share a common set of registers  which  is  how
                     sixel and ReGIS graphics worked on actual hardware.  The default is likely a
                     more useful mode on modern TrueColor  hardware.   This  corresponds  to  the
                     privateColorRegisters  resource.   There  is  no  corresponding command-line
                     option.

       VT102/VT220 Commands:

              Do Soft Reset (softreset)
                     Reset scroll regions.  This can be convenient when some program has left the
                     scroll  regions set incorrectly (often a problem when using VMS or TOPS-20).
                     This corresponds to the VT220 DECSTR control sequence.

              Do Full Reset (hardreset)
                     The full reset entry will clear  the  screen,  reset  tabs  to  every  eight
                     columns,  and  reset  the terminal modes (such as wrap and smooth scroll) to
                     their initial states just after xterm has finished  processing  the  command
                     line  options.   This  corresponds to the VT102 RIS control sequence, with a
                     few obvious differences.  For example, your session is not disconnected as a
                     real VT102 would do.

              Reset and Clear Saved Lines (clearsavedlines)
                     Perform a full reset, and also clear the saved lines.

       Commands for setting the current screen:

              Show Tek Window (tekshow)
                     When  enabled,  pops  the Tektronix 4014 window up (makes it visible).  When
                     disabled, hides the Tektronix 4014 window.

              Switch to Tek Mode (tekmode)
                     When enabled, pops the Tektronix  4014  window  up  if  it  is  not  already
                     visible, and switches the input stream to that window.  When disabled, hides
                     the Tektronix 4014 window and switches input back to the VTxxx window.

              Hide VT Window (vthide)
                     When enabled, hides the VTxxx window, shows the Tektronix 4014 window if  it
                     was  not already visible and switches the input stream to that window.  When
                     disabled, shows the VTxxx window, and switches  the  input  stream  to  that
                     window.

              Show Alternate Screen (altscreen)
                     When  enabled,  shows the alternate screen.  When disabled, shows the normal
                     screen.  Note that the normal screen may have  saved  lines;  the  alternate
                     screen does not.

   VT Fonts
       The fontMenu pops up when when the “control” key and pointer button three are pressed in a
       window.  It sets the font used in the VT102 window,  or  modifies  the  way  the  font  is
       specified or displayed.  There are several sections.

       The first section allows you to select the font from a set of alternatives:

              Default (fontdefault)
                     Set the font to the default, i.e., that given by the *VT100.font resource.

              Unreadable (font1)
                     Set the font to that given by the *VT100.font1 resource.

              Tiny (font2)
                     Set the font to that given by the *VT100.font2 resource.

              Small (font3)
                     Set the font to that given by the *VT100.font3 resource.

              Medium (font4)
                     Set the font to that given by the *VT100.font4 resource.

              Large (font5)
                     Set the font to that given by the *VT100.font5 resource.

              Huge (font6)
                     Set the font to that given by the *VT100.font6 resource.

              Escape Sequence
                     This  allows  you  to  set  the  font  last specified by the Set Font escape
                     sequence (see the document Xterm Control Sequences).

              Selection (fontsel)
                     This allows you to set the font specified the current selection  as  a  font
                     name (if the PRIMARY selection is owned).

       The second section allows you to modify the way it is displayed:

              Bold Fonts
                     This is normally checked (enabled).  When unchecked, xterm will not use bold
                     fonts.  The setting corresponds to the allowBoldFonts resource.

              Line-Drawing Characters (font-linedrawing)
                     When set, tells xterm to draw its own line-drawing characters.  Otherwise it
                     relies on the font containing these.  Compare to the forceBoxChars resource.

              Packed Font (font-packed)
                     When  set,  tells  xterm  to  use  the  minimum glyph-width from a font when
                     displaying characters.  Use the maximum width (unchecked)  to  help  display
                     proportional fonts.  Compare to the forcePackedFont resource.

              Doublesized Characters (font-doublesize)
                     When  set,  xterm  may ask the font server to produce scaled versions of the
                     normal font, for VT102 double-size characters.

       The third section allows you to modify the way it is specified:

              TrueType Fonts (render-font)
                     If the renderFont and corresponding resources were set, this  is  a  further
                     control  whether  xterm  will actually use the Xft library calls to obtain a
                     font.

              UTF-8 Encoding (utf8-mode)
                     This controls whether xterm uses UTF-8  encoding  of  input/output.   It  is
                     useful  for  temporarily switching xterm to display text from an application
                     which does not follow the locale  settings.   It  corresponds  to  the  utf8
                     resource.

              UTF-8 Fonts (utf8-fonts)
                     This  controls whether xterm uses UTF-8 fonts for display.  It is useful for
                     temporarily switching xterm to display text from an application  which  does
                     not  follow  the  locale  settings.   It  combines  the  utf8  and utf8Fonts
                     resources.

              UTF-8 Titles (utf8-titles)
                     This controls  whether  xterm  accepts  UTF-8  encoding  for  title  control
                     sequences.  It corresponds to the utf8Fonts resource.

                     Initially  the  checkmark  is  set  according to both the utf8 and utf8Fonts
                     resource values.  If the  latter  is  set  to  “always”,  the  checkmark  is
                     disabled.    Likewise,  if  there  are  no  fonts  given  in  the  utf8Fonts
                     subresources, then the checkmark also is disabled.

                     The standard XTerm app-defaults file defines both sets of fonts,  while  the
                     UXTerm  app-defaults  file defines only one set.  Assuming the standard app-
                     defaults files, this command will launch xterm able to switch between  UTF-8
                     and ISO-8859-1 encoded fonts:

                         uxterm -class XTerm

              The  fourth section allows you to enable or disable special operations which can be
              controlled by writing escape sequences to the terminal.  These are disabled if  the
              SendEvents feature is enabled:

              Allow Color Ops (allow-font-ops)
                     This  corresponds  to the allowColorOps resource.  Enable or disable control
                     sequences that set/query the colors.

              Allow Font Ops (allow-font-ops)
                     This corresponds to the allowFontOps resource.  Enable  or  disable  control
                     sequences that set/query the font.

              Allow Tcap Ops (allow-tcap-ops)
                     Enable  or disable control sequences that query the terminal's notion of its
                     function-key strings, as termcap or terminfo capabilities.  This corresponds
                     to the allowTcapOps resource.

              Allow Title Ops (allow-title-ops)
                     Enable  or  disable  control  sequences that modify the window title or icon
                     name.  This corresponds to the allowTitleOps resource.

              Allow Window Ops (allow-window-ops)
                     Enable or disable extended window control sequences  (as  used  in  dtterm).
                     This corresponds to the allowWindowOps resource.

   TEK Options
       The  tekMenu  sets  various  modes  in  the Tektronix emulation, and is popped up when the
       “control” key and pointer button two are pressed in the  Tektronix  window.   The  current
       font size is checked in the modes section of the menu.

              Large Characters (tektextlarge)

              #2 Size Characters (tektext2)

              #3 Size Characters (tektext3)

              Small Characters (tektextsmall)

       Commands:

              PAGE (tekpage)
                     Clear the Tektronix window.

              RESET (tekreset)

              COPY (tekcopy)

       Windows:

              Show VT Window (vtshow)

              Switch to VT Mode (vtmode)

              Hide Tek Window (tekhide)

SECURITY

       X environments differ in their security consciousness.

       ·   Most  servers,  run  under  xdm,  are  capable of using a “magic cookie” authorization
           scheme that can provide a reasonable level of  security  for  many  people.   If  your
           server  is  only  using  a  host-based  mechanism to control access to the server (see
           xhost(1)), then if you enable access for a host and other users are also permitted  to
           run  clients  on  that  same  host, it is possible that someone can run an application
           which uses the basic  services  of  the  X  protocol  to  snoop  on  your  activities,
           potentially capturing a transcript of everything you type at the keyboard.

       ·   Any  process  which  has  access  to your X display can manipulate it in ways that you
           might not anticipate, even redirecting your keyboard to itself and sending  events  to
           your  application's  windows.  This is true even with the “magic cookie” authorization
           scheme.  While the allowSendEvents provides some protection against rogue applications
           tampering with your programs, guarding against a snooper is harder.

       ·   The  X  input  extension for instance allows an application to bypass all of the other
           (limited) authorization and security features, including the GrabKeyboard protocol.

       ·   The possibility of an application spying on your keystrokes is of  particular  concern
           when  you  want  to  type in a password or other sensitive data.  The best solution to
           this problem is to use a better authorization mechanism than is provided by X.

       Subject to all of these caveats, a simple mechanism exists for protecting  keyboard  input
       in xterm.

       The  xterm  menu  (see  MENUS above) contains a Secure Keyboard entry which, when enabled,
       attempts to ensure  that  all  keyboard  input  is  directed  only  to  xterm  (using  the
       GrabKeyboard  protocol request).  When an application prompts you for a password (or other
       sensitive data), you can enable Secure Keyboard using the menu, type in the data, and then
       disable Secure Keyboard using the menu again.

       ·   This ensures that you know which window is accepting your keystrokes.

       ·   It  cannot ensure that there are no processes which have access to your X display that
           might be observing the keystrokes as well.

       Only one X client at a time can grab the keyboard, so when you attempt  to  enable  Secure
       Keyboard  it  may  fail.   In  this  case,  the  bell  will sound.  If the Secure Keyboard
       succeeds, the foreground and background colors will be exchanged (as if you  selected  the
       Reverse  Video entry in the Modes menu); they will be exchanged again when you exit secure
       mode.  If the colors do not switch, then you should be very suspicious that you are  being
       spoofed.   If  the  application  you  are  running displays a prompt before asking for the
       password, it is safest to enter secure mode before the prompt gets displayed, and to  make
       sure  that  the  prompt  gets  displayed  correctly  (in  the new colors), to minimize the
       probability of spoofing.  You can also bring up the menu again and make sure that a  check
       mark appears next to the entry.

       Secure Keyboard mode will be disabled automatically if your xterm window becomes iconified
       (or otherwise unmapped), or if you start up a reparenting window manager  (that  places  a
       title  bar or other decoration around the window) while in Secure Keyboard mode.  (This is
       a feature of the X protocol not easily overcome.)  When this happens, the  foreground  and
       background colors will be switched back and the bell will sound in warning.

CHARACTER CLASSES

       Clicking  the  left  pointer button twice in rapid succession (double-clicking) causes all
       characters of the same class (e.g., letters, white space, punctuation) to be selected as a
       “word”.   Since  different  people  have different preferences for what should be selected
       (for example, should filenames be selected as a whole or only the separate subnames),  the
       default  mapping  can  be  overridden  through  the use of the charClass (class CharClass)
       resource.

       This resource is a series of comma-separated range:value pairs.  The  range  is  either  a
       single  number  or  low-high in the range of 0 to 65535, corresponding to the code for the
       character or characters to be set.  The value is arbitrary,  although  the  default  table
       uses  the character number of the first character occurring in the set.  When not in UTF-8
       mode, only the first 256 bytes of this table will be used.

       The default table starts as follows -

           static int charClass[256] = {
           /∗ NUL  SOH  STX  ETX  EOT  ENQ  ACK  BEL */
               32,   1,   1,   1,   1,   1,   1,   1,
           /∗  BS   HT   NL   VT   NP   CR   SO   SI */
                1,  32,   1,   1,   1,   1,   1,   1,
           /∗ DLE  DC1  DC2  DC3  DC4  NAK  SYN  ETB */
                1,   1,   1,   1,   1,   1,   1,   1,
           /∗ CAN   EM  SUB  ESC   FS   GS   RS   US */
                1,   1,   1,   1,   1,   1,   1,   1,
           /∗  SP    !    "    #    $    %    &    ' */
               32,  33,  34,  35,  36,  37,  38,  39,
           /∗   (    )    *    +    ,    -    .    / */
               40,  41,  42,  43,  44,  45,  46,  47,
           /∗   0    1    2    3    4    5    6    7 */
               48,  48,  48,  48,  48,  48,  48,  48,
           /∗   8    9    :    ;    <    =    >    ? */
               48,  48,  58,  59,  60,  61,  62,  63,
           /∗   @    A    B    C    D    E    F    G */
               64,  48,  48,  48,  48,  48,  48,  48,
           /∗   H    I    J    K    L    M    N    O */
               48,  48,  48,  48,  48,  48,  48,  48,
           /∗   P    Q    R    S    T    U    V    W */
               48,  48,  48,  48,  48,  48,  48,  48,
           /∗   X    Y    Z    [    \    ]    ^    _ */
               48,  48,  48,  91,  92,  93,  94,  48,
           /∗   `    a    b    c    d    e    f    g */
               96,  48,  48,  48,  48,  48,  48,  48,
           /∗   h    i    j    k    l    m    n    o */
               48,  48,  48,  48,  48,  48,  48,  48,
           /∗   p    q    r    s    t    u    v    w */
               48,  48,  48,  48,  48,  48,  48,  48,
           /∗   x    y    z    {    |    }    ~  DEL */
               48,  48,  48, 123, 124, 125, 126,   1,
           /∗ x80  x81  x82  x83  IND  NEL  SSA  ESA */
                1,   1,   1,   1,   1,   1,   1,   1,
           /∗ HTS  HTJ  VTS  PLD  PLU   RI  SS2  SS3 */
                1,   1,   1,   1,   1,   1,   1,   1,
           /∗ DCS  PU1  PU2  STS  CCH   MW  SPA  EPA */
                1,   1,   1,   1,   1,   1,   1,   1,
           /∗ x98  x99  x9A  CSI   ST  OSC   PM  APC */
                1,   1,   1,   1,   1,   1,   1,   1,
           /∗   -    i   c/    L   ox   Y-    |   So */
              160, 161, 162, 163, 164, 165, 166, 167,
           /∗  ..   c0   ip   <<    _        R0    - */
              168, 169, 170, 171, 172, 173, 174, 175,
           /∗   o   +-    2    3    '    u   q|    . */
              176, 177, 178, 179, 180, 181, 182, 183,
           /∗   ,    1    2   >>  1/4  1/2  3/4    ? */
              184, 185, 186, 187, 188, 189, 190, 191,
           /∗  A`   A'   A^   A~   A:   Ao   AE   C, */
               48,  48,  48,  48,  48,  48,  48,  48,
           /∗  E`   E'   E^   E:   I`   I'   I^   I: */
               48,  48,  48,  48,  48,  48,  48,  48,
           /∗  D-   N~   O`   O'   O^   O~   O:    X */
               48,  48,  48,  48,  48,  48,  48, 215,
           /∗  O/   U`   U'   U^   U:   Y'    P    B */
               48,  48,  48,  48,  48,  48,  48,  48,
           /∗  a`   a'   a^   a~   a:   ao   ae   c, */
               48,  48,  48,  48,  48,  48,  48,  48,
           /∗  e`   e'   e^   e:    i`  i'   i^   i: */
               48,  48,  48,  48,  48,  48,  48,  48,
           /∗   d   n~   o`   o'   o^   o~   o:   -: */
               48,  48,  48,  48,  48,  48,  48, 247,
           /∗  o/   u`   u'   u^   u:   y'    P   y: */
               48,  48,  48,  48,  48,  48,  48,  48};

              For example, the string “33:48,37:48,45-47:48,38:48” indicates that the exclamation
              mark, percent sign, dash, period, slash, and ampersand characters should be treated
              the same way as characters and numbers.  This is useful  for  cutting  and  pasting
              electronic mailing addresses and filenames.

KEY BINDINGS

       It  is  possible  to rebind keys (or sequences of keys) to arbitrary strings for input, by
       changing the translations resources for  the  vt100  or  tek4014  widgets.   Changing  the
       translations  resource  for  events  other than key and button events is not expected, and
       will cause unpredictable behavior.

   Actions
       The following actions are provided for  use  within  the  vt100  or  tek4014  translations
       resources:

       allow-color-ops(on/off/toggle)
               This action sets, unsets or toggles the allowColorOps resource and is also invoked
               by the allow-color-ops entry in fontMenu.

       allow-font-ops(on/off/toggle)
               This action sets, unsets or toggles the allowFontOps resource and is also  invoked
               by the allow-font-ops entry in fontMenu.

       allow-send-events(on/off/toggle)
               This  action  sets,  unsets  or  toggles  the allowSendEvents resource and is also
               invoked by the allowsends entry in mainMenu.

       allow-tcap-ops(on/off/toggle)
               This action sets, unsets or toggles the allowTcapOps resource and is also  invoked
               by the allow-tcap-ops entry in fontMenu.

       allow-title-ops(on/off/toggle)
               This action sets, unsets or toggles the allowTitleOps resource and is also invoked
               by the allow-title-ops entry in fontMenu.

       allow-window-ops(on/off/toggle)
               This action sets, unsets or  toggles  the  allowWindowOps  resource  and  is  also
               invoked by the allow-window-ops entry in fontMenu.

       alt-sends-escape()
               This action toggles the state of the altSendsEscape resource.

       bell([percent])
               This action rings the keyboard bell at the specified percentage above or below the
               base volume.

       clear-saved-lines()
               This action does hard-reset() (see below) and also clears  the  history  of  lines
               saved  off  the  top  of  the screen.  It is also invoked from the clearsavedlines
               entry in vtMenu.  The effect is  identical  to  a  hardware  reset  (RIS)  control
               sequence.

       copy-selection(destname [, ...])
               This  action  puts  the  currently  selected  text  into  all of the selections or
               cutbuffers specified by destname.  Unlike select-end, it does  not  send  a  mouse
               position or otherwise modify the internal selection state.

       create-menu(m/v/f/t)
               This  action creates one of the menus used by xterm, if it has not been previously
               created.  The parameter values are the menu  names:  mainMenu,  vtMenu,  fontMenu,
               tekMenu, respectively.

       dabbrev-expand()
               Expands  the  word  before cursor by searching in the preceding text on the screen
               and in the scrollback buffer for words starting with that abbreviation.  Repeating
               dabbrev-expand()  several  times in sequence searches for an alternative expansion
               by looking farther back.  Lack of more matches is signaled by a beep().   Attempts
               to  expand  an  empty  word  (i.e.,  when  cursor  is  preceded  by a space) yield
               successively all previous words.  Consecutive identical  expansions  are  ignored.
               The word here is defined as a sequence of non-whitespace characters.  This feature
               partially emulates the behavior  of  “dynamic  abbreviation”  expansion  in  Emacs
               (bound there to M-/).  Here is a resource setting for xterm which will do the same
               thing:

                   *VT100*translations:    #override \n\
                           Meta <KeyPress> /:dabbrev-expand()

       deiconify()
               Changes the window state back to normal, if it was iconified.

       delete-is-del()
               This action toggles the state of the deleteIsDEL resource.

       dired-button()
               Handles a button event (other than press  and  release)  by  echoing  the  event's
               position (i.e., character line and column) in the following format:

                       ^X ESC G <line+“ ”> <col+“ ”>

       exec-formatted(format, sourcename [, ...])
               Execute an external command, using the current selection for part of the command's
               parameters.  The first parameter, format  gives  the  basic  command.   Succeeding
               parameters specify the selection source as in insert-selection.

               The format parameter allows these substitutions:

               %%   inserts a "%".

               %P   the  screen-position  at  the  beginning  of  the  highlighted  region,  as a
                    semicolon-separated pair of integers using the values that  the  CUP  control
                    sequence would use.

               %p   the  screen-position after the beginning of the highlighted region, using the
                    same convention as “%P”.

               %S   the length of the string that “%s” would insert.

               %s   the content of the selection, unmodified.

               %T   the length of the string that “%t” would insert.

               %t   the selection, trimmed of leading/trailing whitespace.  Embedded spaces  (and
                    newlines) are copied as is.

               %R   the length of the string that “%r” would insert.

               %r   the selection, trimmed of trailing whitespace.

               %V   the  video  attributes  at  the  beginning  of  the  highlighted region, as a
                    semicolon-separated list of integers using the values that  the  SGR  control
                    sequence would use.

               %v   the  video attributes after the end of the highlighted region, using the same
                    convention as “%V”.

               After constructing the command-string, xterm forks a subprocess and  executes  the
               command, which completes independently of xterm.

               For  example,  this  translation  would  invoke a new xterm process to view a file
               whose name is selected while holding the shift  key  down.   The  new  process  is
               started when the mouse button is released:

                   *VT100*translations: #override Shift \
                       <Btn1Up>: exec-formatted("xterm -e view '%t'", SELECT)

       exec-selectable(format, onClicks)
               Execute  an  external  command,  using data copied from the screen for part of the
               command's parameters.  The first parameter, format gives the basic command  as  in
               exec-formatted.  The second parameter specifies the method for copying the data as
               in the onClicks resource.

       fullscreen(on/off/toggle)
               This action sets, unsets or toggles the fullscreen resource.

       iconify()
               Iconifies the window.

       hard-reset()
               This action resets the scrolling region, tabs, window size, and  cursor  keys  and
               clears the screen.  It is also invoked from the hardreset entry in vtMenu.

       ignore()
               This  action  ignores  the  event  but  checks for special pointer position escape
               sequences.

       insert()
               This action inserts the character or string  associated  with  the  key  that  was
               pressed.

       insert-eight-bit()
               This  action  inserts  an  eight-bit  (Meta)  version  of  the character or string
               associated with the key that was pressed.  Only  single-byte  values  are  treated
               specially.   The  exact  action depends on the value of the altSendsEscape and the
               metaSendsEscape and the eightBitInput resources.  The metaSendsEscape resource  is
               tested first.  See the eightBitInput resource for a full discussion.

               The term “eight-bit” is misleading: xterm checks if the key is in the range 128 to
               255 (the eighth bit is set).  If the value is in  that  range,  depending  on  the
               resource values, xterm may then do one of the following:

               ·   add 128 to the value, setting its eighth bit,

               ·   send an ESC byte before the key, or

               ·   send the key unaltered.

       insert-formatted(format, sourcename [, ...])
               Insert  the  current  selection  or  data  related  to  it,  formatted.  The first
               parameter,  format  gives  the  template  for  the  data  as  in   exec-formatted.
               Succeeding parameters specify the selection source as in insert-selection.

       insert-selectable(format, onClicks)
               Insert  data copied from the screen, formatted.  The first parameter, format gives
               the template for the data as in exec-formatted.  The  second  parameter  specifies
               the method for copying the data as in the onClicks resource.

       insert-selection(sourcename [, ...])
               This  action  inserts  the string found in the selection or cutbuffer indicated by
               sourcename.  Sources are checked in the order given (case  is  significant)  until
               one   is   found.   Commonly-used  selections  include:  PRIMARY,  SECONDARY,  and
               CLIPBOARD.  Cut buffers are typically named CUT_BUFFER0 through CUT_BUFFER7.

       insert-seven-bit()
               This action is a synonym for insert().  The term  “seven-bit”  is  misleading:  it
               only  implies  that xterm does not try to add 128 to the key's value as in insert-
               eight-bit().

       interpret(control-sequence)
               Interpret the given control sequence locally, i.e.,  without  passing  it  to  the
               host.   This  works  by  inserting  the control sequence at the front of the input
               buffer.  Use “\” to escape octal digits in the string.  Xt does not allow  you  to
               put a null character (i.e., “\000”) in the string.

       keymap(name)
               This  action  dynamically  defines  a new translation table whose resource name is
               name with the suffix Keymap (case is significant).  The  name  None  restores  the
               original translation table.

       larger-vt-font()
               Set  the font to the next larger one, based on the font dimensions.  See also set-
               vt-font().

       load-vt-fonts(name[,class])
               Load fontnames from the given subresource name  and  class.   That  is,  load  the
               “*VT100.name.font”,  resource  as  “*VT100.font”  etc.   If  no name is given, the
               original set of fontnames is restored.

               Unlike set-vt-font(), this does not affect the  escape-  and  select-fonts,  since
               those  are  not  based  on  resource  values.   It  does  affect the fonts loosely
               organized under the “Default” menu entry, including font, boldFont,  wideFont  and
               wideBoldFont.

       maximize()
               Resizes the window to fill the screen.

       meta-sends-escape()
               This action toggles the state of the metaSendsEscape resource.

       popup-menu(menuname)
               This  action displays the specified popup menu.  Valid names (case is significant)
               include:  mainMenu, vtMenu, fontMenu, and tekMenu.

       print(printer-flags)
               This action prints the window.  It is also invoked by the print entry in mainMenu.

               The action  accepts  optional  parameters,  which  temporarily  override  resource
               settings.  The parameter values are matched ignoring case:

               noFormFeed
                    no  form  feed  will  be  sent  at  the  end  of the last line printed (i.e.,
                    printerFormFeed is ``false'').

               FormFeed
                    a form feed will be  sent  at  the  end  of  the  last  line  printed  (i.e.,
                    printerFormFeed is ``true'').

               noNewLine
                    no  newline  will  be  sent  at the end of the last line printed, and wrapped
                    lines will be combined into long lines (i.e., printerNewLine is ``false'').

               NewLine
                    a newline will be sent at the end of the last line  printed,  and  each  line
                    will   be   limited  (by  adding  a  newline)  to  the  screen  width  (i.e.,
                    printerNewLine is ``true'').

               noAttrs
                    the page is printed without attributes (i.e., printAttributes is ``0'').

               monoAttrs
                    the page is printed with monochrome (vt220) attributes (i.e., printAttributes
                    is ``1'').

               colorAttrs
                    the  page  is  printed  with  ANSI color attributes (i.e., printAttributes is
                    ``2'').

       print-everything(printer-flags)
               This action sends the entire text history,  in  addition  to  the  text  currently
               visible,  to the program given in the printerCommand resource.  It allows the same
               optional parameters as the print action.  With a  suitable  printer  command,  the
               action can be used to load the text history in an editor.

       print-immediate()
               Sends  the  text  of  the  current  window directly to a file, as specified by the
               printFileImmediate, printModeImmediate and printOptsImmediate resources.

       print-on-error()
               Toggles a flag telling xterm that if it exits with an X error, to send the text of
               the  current  window  directly  to  a  file,  as specified by the printFileXError,
               printModeXError and printOptsXError resources.

       print-redir()
               This action toggles the printerControlMode between 0  and  2.   The  corresponding
               popup  menu  entry is useful for switching the printer off if you happen to change
               your mind after deciding to print random binary files on the terminal.

       quit()  This action sends a SIGHUP to the subprogram and exits.  It is also invoked by the
               quit entry in mainMenu.

       readline-button()
               Supports  the  optional  readline  feature  by  echoing repeated cursor forward or
               backward control sequences on button release  event,  to  request  that  the  host
               application update its notion of the cursor's position to match the button event.

       redraw()
               This  action  redraws  the  window.   It  is  also  invoked by the redraw entry in
               mainMenu.

       restore()
               Restores the window to the size before it was last maximized.

       scroll-back(count [,units [,mouse] ])
               This action scrolls the text window backward so  that  text  that  had  previously
               scrolled off the top of the screen is now visible.

               The  count  argument  indicates  the number of units (which may be page, halfpage,
               pixel, or line) by which to scroll.

               An adjustment can be specified for these values by appending a  “+”  or  “-”  sign
               followed by a number, e.g., page-2 to specify 2 lines less than a page.

               If  the third parameter mouse is given, the action is ignored when mouse reporting
               is enabled.

       scroll-forw(count [,units [,mouse] ])
               This action is similar  to  scroll-back  except  that  it  scrolls  in  the  other
               direction.

       secure()
               This  action  toggles  the  Secure  Keyboard  mode  described in the section named
               SECURITY, and is invoked from the securekbd entry in mainMenu.

       scroll-lock(on/off/toggle)
               This action sets, unsets or toggles  internal  state  which  tells  xterm  whether
               Scroll Lock is active, subject to the allowScrollLock resource.

       select-cursor-end(destname [, ...])
               This  action  is  similar to select-end except that it should be used with select-
               cursor-start.

       select-cursor-extend()
               This action is similar to select-extend except that it should be used with select-
               cursor-start.

       select-cursor-start()
               This  action is similar to select-start except that it begins the selection at the
               current text cursor position.

       select-end(destname [, ...])
               This action puts the currently  selected  text  into  all  of  the  selections  or
               cutbuffers  specified by destname.  It also sends a mouse position and updates the
               internal selection state to reflect the end of the selection process.

       select-extend()
               This action tracks the pointer and extends the selection.  It should only be bound
               to Motion events.

       select-set()
               This  action  stores  text  that  corresponds  to  the  current selection, without
               affecting the selection mode.

       select-start()
               This action begins text selection  at  the  current  pointer  location.   See  the
               section on POINTER USAGE for information on making selections.

       send-signal(signame)
               This  action  sends the signal named by signame to the xterm subprocess (the shell
               or program specified with the -e command line option).  It is also invoked by  the
               suspend,  continue,  interrupt,  hangup,  terminate, and kill entries in mainMenu.
               Allowable signal names are (case is not significant): tstp (if  supported  by  the
               operating  system),  suspend  (same  as tstp), cont (if supported by the operating
               system), int, hup, term, quit, alrm, alarm (same as alrm) and kill.

       set-8-bit-control(on/off/toggle)
               This action sets, unsets or toggles the  eightBitControl  resource.   It  is  also
               invoked from the 8-bit-control entry in vtMenu.

       set-allow132(on/off/toggle)
               This  action  sets,  unsets or toggles the c132 resource.  It is also invoked from
               the allow132 entry in vtMenu.

       set-altscreen(on/off/toggle)
               This action sets, unsets or toggles between the alternate and current screens.

       set-appcursor(on/off/toggle)
               This action sets, unsets or toggles the handling Application Cursor Key  mode  and
               is also invoked by the appcursor entry in vtMenu.

       set-appkeypad(on/off/toggle)
               This action sets, unsets or toggles the handling of Application Keypad mode and is
               also invoked by the appkeypad entry in vtMenu.

       set-autolinefeed(on/off/toggle)
               This action sets, unsets or toggles automatic insertion of linefeeds.  It is  also
               invoked by the autolinefeed entry in vtMenu.

       set-autowrap(on/off/toggle)
               This  action sets, unsets or toggles automatic wrapping of long lines.  It is also
               invoked by the autowrap entry in vtMenu.

       set-backarrow(on/off/toggle)
               This action sets, unsets or toggles the backarrowKey resource.  It is also invoked
               from the backarrow key entry in vtMenu.

       set-bellIsUrgent(on/off/toggle)
               This action sets, unsets or toggles the bellIsUrgent resource.  It is also invoked
               by the bellIsUrgent entry in vtMenu.

       set-cursorblink(on/off/toggle)
               This action sets, unsets or toggles the cursorBlink resource.  It is also  invoked
               from the cursorblink entry in vtMenu.

       set-cursesemul(on/off/toggle)
               This  action sets, unsets or toggles the curses resource.  It is also invoked from
               the cursesemul entry in vtMenu.

       set-font-doublesize(on/off/toggle)
               This action sets, unsets or toggles  the  fontDoublesize  resource.   It  is  also
               invoked by the font-doublesize entry in fontMenu.

       set-hp-function-keys(on/off/toggle)
               This  action  sets,  unsets  or  toggles  the hpFunctionKeys resource.  It is also
               invoked by the hpFunctionKeys entry in mainMenu.

       set-jumpscroll(on/off/toggle)
               This action sets, unsets or toggles the jumpscroll resource.  It is  also  invoked
               by the jumpscroll entry in vtMenu.

       set-font-linedrawing(on/off/toggle)
               This  action  sets,  unsets  or  toggles  the  xterm's state regarding whether the
               current font has line-drawing characters and whether it should draw them directly.
               It is also invoked by the font-linedrawing entry in fontMenu.

       set-font-packed(on/off/toggle)
               This  action sets, unsets or toggles the forcePackedFont's resource which controls
               use of the font's minimum or maximum glyph width.  It is also invoked by the font-
               packed entry in fontMenu.

       set-keep-clipboard(on/off/toggle)
               This action sets, unsets or toggles the keepClipboard resource.

       set-keep-selection(on/off/toggle)
               This  action  sets,  unsets  or  toggles  the  keepSelection resource.  It is also
               invoked by the keepSelection entry in vtMenu.

       set-logging(on/off/toggle)
               This action sets, unsets or toggles the state of the logging option.

       set-old-function-keys(on/off/toggle)
               This action sets, unsets or toggles the state of legacy function keys.  It is also
               invoked by the oldFunctionKeys entry in mainMenu.

       set-marginbell(on/off/toggle)
               This action sets, unsets or toggles the marginBell resource.

       set-num-lock(on/off/toggle)
               This action toggles the state of the numLock resource.

       set-pop-on-bell(on/off/toggle)
               This action sets, unsets or toggles the popOnBell resource.  It is also invoked by
               the poponbell entry in vtMenu.

       set-private-colors(on/off/toggle)
               This action sets, unsets or toggles the privateColorRegisters resource.

       set-render-font(on/off/toggle)
               This action sets, unsets or toggles the renderFont resource.  It is  also  invoked
               by the render-font entry in fontMenu.

       set-reverse-video(on/off/toggle)
               This action sets, unsets or toggles the reverseVideo resource.  It is also invoked
               by the reversevideo entry in vtMenu.

       set-reversewrap(on/off/toggle)
               This action sets, unsets or toggles the reverseWrap resource.  It is also  invoked
               by the reversewrap entry in vtMenu.

       set-scroll-on-key(on/off/toggle)
               This  action  sets,  unsets or toggles the scrollKey resource.  It is also invoked
               from the scrollkey entry in vtMenu.

       set-scroll-on-tty-output(on/off/toggle)
               This action sets, unsets or toggles the  scrollTtyOutput  resource.   It  is  also
               invoked from the scrollttyoutput entry in vtMenu.

       set-scrollbar(on/off/toggle)
               This action sets, unsets or toggles the scrollbar resource.  It is also invoked by
               the scrollbar entry in vtMenu.

       set-sco-function-keys(on/off/toggle)
               This action sets, unsets or toggles the  scoFunctionKeys  resource.   It  is  also
               invoked by the scoFunctionKeys entry in mainMenu.

       set-select(on/off/toggle)
               This  action  sets,  unsets or toggles the selectToClipboard resource.  It is also
               invoked by the selectToClipboard entry in vtMenu.

       set-sixel-scrolling(on/off/toggle)
               This action toggles between inline (sixel scrolling) and absolute positioning.  It
               can also be controlled via DEC private mode 80 (DECSDM) or from the sixelScrolling
               entry in the btMenu.

       set-sun-function-keys(on/off/toggle)
               This action sets, unsets or toggles the  sunFunctionKeys  resource.   It  is  also
               invoked by the sunFunctionKeys entry in mainMenu.

       set-sun-keyboard(on/off/toggle)
               This  action sets, unsets or toggles the sunKeyboard resource.  It is also invoked
               by the sunKeyboard entry in mainMenu.

       set-tek-text(large/2/3/small)
               This action sets the font used in  the  Tektronix  window  to  the  value  of  the
               selected resource according to the argument.  The argument can be either a keyword
               or single-letter alias, as shown in parentheses:

               large (l)
                    Use resource fontLarge, same as menu entry tektextlarge.

               two (2)
                    Use resource font2, same as menu entry tektext2.

               three (3)
                    Use resource font3, same as menu entry tektext3.

               small (s)
                    Use resource fontSmall, same as menu entry tektextsmall.

       set-terminal-type(type)
               This action directs output to either the vt or tek windows, according to the  type
               string.  It is also invoked by the tekmode entry in vtMenu and the vtmode entry in
               tekMenu.

       set-titeInhibit(on/off/toggle)
               This action sets, unsets or  toggles  the  titeInhibit  resource,  which  controls
               switching between the alternate and current screens.

       set-toolbar(on/off/toggle)
               This  action  sets,  unsets or toggles the toolbar feature.  It is also invoked by
               the toolbar entry in mainMenu.

       set-utf8-mode(on/off/toggle)
               This action sets, unsets or toggles the utf8 resource.  It is also invoked by  the
               utf8-mode entry in fontMenu.

       set-utf8-title(on/off/toggle)
               This action sets, unsets or toggles the utf8Title resource.  It is also invoked by
               the utf8-title entry in fontMenu.

       set-visibility(vt/tek,on/off/toggle)
               This action sets, unsets or toggles whether or not  the  vt  or  tek  windows  are
               visible.  It is also invoked from the tekshow and vthide entries in vtMenu and the
               vtshow and tekhide entries in tekMenu.

       set-visual-bell(on/off/toggle)
               This action sets, unsets or toggles the visualBell resource.  It is  also  invoked
               by the visualbell entry in vtMenu.

       set-vt-font(d/1/2/3/4/5/6/e/s [,normalfont [, boldfont]])
               This  action sets the font or fonts currently being used in the VT102 window.  The
               first argument is a single character that specifies the font to be used:

               d or D indicate the default font (the font initially used when xterm was started),

               1 through 6 indicate the fonts specified by the font1 through font6 resources,

               e or E indicate the normal and bold fonts that have been set through escape  codes
                      (or specified as the second and third action arguments, respectively), and

               s  or  S  indicate  the  font  selection (as made by programs such as xfontsel(1))
                      indicated by the second action argument.

               If xterm is configured to support wide  characters,  an  additional  two  optional
               parameters are recognized for the e argument: wide font and wide bold font.

       smaller-vt-font()
               Set the font to the next smaller one, based on the font dimensions.  See also set-
               vt-font().

       soft-reset()
               This action resets the scrolling region.  It is also invoked  from  the  softreset
               entry  in  vtMenu.   The  effect  is  identical  to  a soft reset (DECSTR) control
               sequence.

       spawn-new-terminal(params)
               Spawn a new xterm process.  This is available  on  systems  which  have  a  modern
               version of the process filesystem, e.g., “/proc”, which xterm can read.

               Use the “cwd” process entry, e.g., /proc/12345/cwd to obtain the working directory
               of the process which is running in the current xterm.

               On systems which have the “exe” process entry, e.g., /proc/12345/exe, use this  to
               obtain the actual executable.  Otherwise, use the $PATH variable to find xterm.

               If parameters are given in the action, pass them to the new xterm process.

       start-extend()
               This  action  is  similar to select-start except that the selection is extended to
               the current pointer location.

       start-cursor-extend()
               This action is similar to select-extend except that the selection is  extended  to
               the current text cursor position.

       string(string)
               This  action inserts the specified text string as if it had been typed.  Quotation
               is necessary if the string contains whitespace or non-alphanumeric characters.  If
               the  string  argument  begins with the characters “0x”, it is interpreted as a hex
               character constant.

       tek-copy()
               This action copies the escape codes used to generate the current  window  contents
               to  a  file  in  the  current  directory beginning with the name COPY.  It is also
               invoked from the tekcopy entry in tekMenu.

       tek-page()
               This action clears the Tektronix window.  It is also invoked by the tekpage  entry
               in tekMenu.

       tek-reset()
               This action resets the Tektronix window.  It is also invoked by the tekreset entry
               in tekMenu.

       vi-button()
               Handles a button event (other  than  press  and  release)  by  echoing  a  control
               sequence  computed  from  the  event's  line  number in the screen relative to the
               current line:

                       ESC ^P
               or
                       ESC ^N

               according to whether the event is before, or after the current line, respectively.
               The  ^N  (or  ^P)  is  repeated once for each line that the event differs from the
               current line.  The control sequence is omitted altogether if the button  event  is
               on the current line.

       visual-bell()
               This action flashes the window quickly.

       The Tektronix window also has the following action:

       gin-press(l/L/m/M/r/R)
               This action sends the indicated graphics input code.

   Default Key Bindings
       The  default  bindings  in  the  VT102  window  use  the SELECT token, which is set by the
       selectToClipboard resource.  These are for the vt100 widget:

                     Shift <KeyPress> Prior:scroll-back(1,halfpage) \n\
                      Shift <KeyPress> Next:scroll-forw(1,halfpage) \n\
                    Shift <KeyPress> Select:select-cursor-start() \
                                            select-cursor-end(SELECT, CUT_BUFFER0) \n\
                    Shift <KeyPress> Insert:insert-selection(SELECT, CUT_BUFFER0) \n\
                            Alt <Key>Return:fullscreen() \n\
                   <KeyRelease> Scroll_Lock:scroll-lock() \n\
               Shift~Ctrl <KeyPress> KP_Add:larger-vt-font() \n\
               Shift Ctrl <KeyPress> KP_Add:smaller-vt-font() \n\
               Shift <KeyPress> KP_Subtract:smaller-vt-font() \n\
                           ~Meta <KeyPress>:insert-seven-bit() \n\
                            Meta <KeyPress>:insert-eight-bit() \n\
                           !Ctrl <Btn1Down>:popup-menu(mainMenu) \n\
                      !Lock Ctrl <Btn1Down>:popup-menu(mainMenu) \n\
            !Lock Ctrl @Num_Lock <Btn1Down>:popup-menu(mainMenu) \n\
                ! @Num_Lock Ctrl <Btn1Down>:popup-menu(mainMenu) \n\
                           ~Meta <Btn1Down>:select-start() \n\
                         ~Meta <Btn1Motion>:select-extend() \n\
                           !Ctrl <Btn2Down>:popup-menu(vtMenu) \n\
                      !Lock Ctrl <Btn2Down>:popup-menu(vtMenu) \n\
            !Lock Ctrl @Num_Lock <Btn2Down>:popup-menu(vtMenu) \n\
                ! @Num_Lock Ctrl <Btn2Down>:popup-menu(vtMenu) \n\
                     ~Ctrl ~Meta <Btn2Down>:ignore() \n\
                            Meta <Btn2Down>:clear-saved-lines() \n\
                       ~Ctrl ~Meta <Btn2Up>:insert-selection(SELECT, CUT_BUFFER0) \n\
                           !Ctrl <Btn3Down>:popup-menu(fontMenu) \n\
                      !Lock Ctrl <Btn3Down>:popup-menu(fontMenu) \n\
            !Lock Ctrl @Num_Lock <Btn3Down>:popup-menu(fontMenu) \n\
                ! @Num_Lock Ctrl <Btn3Down>:popup-menu(fontMenu) \n\
                     ~Ctrl ~Meta <Btn3Down>:start-extend() \n\
                         ~Meta <Btn3Motion>:select-extend() \n\
                            Ctrl <Btn4Down>:scroll-back(1,halfpage,m) \n\
                       Lock Ctrl <Btn4Down>:scroll-back(1,halfpage,m) \n\
             Lock @Num_Lock Ctrl <Btn4Down>:scroll-back(1,halfpage,m) \n\
                  @Num_Lock Ctrl <Btn4Down>:scroll-back(1,halfpage,m) \n\
                                 <Btn4Down>:scroll-back(5,line,m)     \n\
                            Ctrl <Btn5Down>:scroll-forw(1,halfpage,m) \n\
                       Lock Ctrl <Btn5Down>:scroll-forw(1,halfpage,m) \n\
             Lock @Num_Lock Ctrl <Btn5Down>:scroll-forw(1,halfpage,m) \n\
                  @Num_Lock Ctrl <Btn5Down>:scroll-forw(1,halfpage,m) \n\
                                 <Btn5Down>:scroll-forw(5,line,m)     \n\
                                    <BtnUp>:select-end(SELECT, CUT_BUFFER0) \n\
                                  <BtnDown>:ignore()

       The default bindings in the Tektronix window are analogous but less extensive.  These  are
       for the tek4014 widget:

                            ~Meta<KeyPress>: insert-seven-bit() \n\
                             Meta<KeyPress>: insert-eight-bit() \n\
                           !Ctrl <Btn1Down>: popup-menu(mainMenu) \n\
                      !Lock Ctrl <Btn1Down>: popup-menu(mainMenu) \n\
            !Lock Ctrl @Num_Lock <Btn1Down>: popup-menu(mainMenu) \n\
                 !Ctrl @Num_Lock <Btn1Down>: popup-menu(mainMenu) \n\
                           !Ctrl <Btn2Down>: popup-menu(tekMenu) \n\
                      !Lock Ctrl <Btn2Down>: popup-menu(tekMenu) \n\
            !Lock Ctrl @Num_Lock <Btn2Down>: popup-menu(tekMenu) \n\
                 !Ctrl @Num_Lock <Btn2Down>: popup-menu(tekMenu) \n\
                      Shift ~Meta<Btn1Down>: gin-press(L) \n\
                            ~Meta<Btn1Down>: gin-press(l) \n\
                      Shift ~Meta<Btn2Down>: gin-press(M) \n\
                            ~Meta<Btn2Down>: gin-press(m) \n\
                      Shift ~Meta<Btn3Down>: gin-press(R) \n\
                            ~Meta<Btn3Down>: gin-press(r)

       Here is an example which uses shifted select/paste to copy to the clipboard, and unshifted
       select/paste for the primary selection.  In each case, a (different) cut buffer is also  a
       target or source of the select/paste operation.  It is important to remember however, that
       cut buffers store data in ISO-8859-1 encoding,  while  selections  can  store  data  in  a
       variety of formats and encodings.  While xterm owns the selection, it highlights it.  When
       it loses the selection, it removes the corresponding highlight.  But you can  still  paste
       from the corresponding cut buffer.

           *VT100*translations:    #override \n\
               ~Shift~Ctrl<Btn2Up>: insert-selection(PRIMARY, CUT_BUFFER0) \n\
               Shift~Ctrl<Btn2Up>:  insert-selection(CLIPBOARD, CUT_BUFFER1) \n\
               ~Shift<BtnUp>:       select-end(PRIMARY, CUT_BUFFER0) \n\
               Shift<BtnUp>:        select-end(CLIPBOARD, CUT_BUFFER1)

       In  the  example,  the  class  name  VT100 is used rather than the widget name.  These are
       different; the class name provides a more-specific match than the widget name.  A  leading
       “*”  is  used  because  the widget hierarchy above the vt100 widget depends on whether the
       toolbar support is compiled into xterm.

       Below is shown a sample of how the keymap() action may be used to  add  special  keys  for
       entering commonly-typed words:

           *VT100.Translations: #override <Key>F13: keymap(dbx)
           *VT100.dbxKeymap.translations: \
                   <Key>F14:       keymap(None) \n\
                   <Key>F17:       string("next") string(0x0d) \n\
                   <Key>F18:       string("step") string(0x0d) \n\
                   <Key>F19:       string("continue") string(0x0d) \n\
                   <Key>F20:       string("print ") insert-selection(PRIMARY, CUT_BUFFER0)

   Default Scrollbar Bindings
       Key  bindings  are  normally  associated  with  the  vt100 or tek4014 widgets which act as
       terminal emulators.  Xterm's scrollbar (and toolbar if  it  is  configured)  are  separate
       widgets.   Because  all  of  these use the X Toolkit, they have corresponding translations
       resources.  Those  resources  are  distinct,  and  match  different  patterns,  e.g.,  the
       differences in widget-name and number of levels of widgets which they may contain.

       The scrollbar widget is a child of the vt100 widget.  It is positioned on top of the vt100
       widget.  Toggling the scrollbar on and off causes the vt100 widget to resize.

       The default bindings for the scrollbar widget use only mouse-button events:

                                 <Btn5Down>: StartScroll(Forward) \n\
                                 <Btn1Down>: StartScroll(Forward) \n\
                                 <Btn2Down>: StartScroll(Continuous) MoveThumb() NotifyThumb() \n\
                                 <Btn3Down>: StartScroll(Backward) \n\
                                 <Btn4Down>: StartScroll(Backward) \n\
                                 <Btn2Motion>: MoveThumb() NotifyThumb() \n\
                                 <BtnUp>:    NotifyScroll(Proportional) EndScroll()

       Events which the scrollbar widget does not recognize at all are lost.

       However, at startup, xterm augments these translations with the default translations  used
       for  the  vt100 widget, together with the resource “actions” which those translations use.
       Because the scrollbar (or menubar) widgets do not recognize these actions (but because  it
       has a corresponding translation), they are passed on to the vt100 widget.

       This augmenting of the scrollbar's translations has a few limitations:

       ·   Xterm  knows  what  the  default  translations  are,  but there is no suitable library
           interface for determining what customizations a user  may  have  added  to  the  vt100
           widget.   All  that  xterm  can do is augment the scrollbar widget to give it the same
           starting point for further customization by the user.

       ·   Events in the gap between the widgets may be lost.

       ·   Compose sequences begun in one widget cannot be completed in the  other,  because  the
           input methods for each widget do not share context information.

       Most  customizations  of  the scrollbar translations do not concern key bindings.  Rather,
       users are generally more interested in changing the bindings of the  mouse  buttons.   For
       example,  some  people  prefer  using  the  left pointer button for dragging the scrollbar
       thumb.  That can be set up by altering the translations resource, e.g.,

           *VT100.scrollbar.translations:  #override \n\
                   <Btn5Down>:     StartScroll(Forward) \n\
                   <Btn1Down>:     StartScroll(Continuous) MoveThumb() NotifyThumb() \n\
                   <Btn4Down>:     StartScroll(Backward) \n\
                   <Btn1Motion>:   MoveThumb() NotifyThumb() \n\
                   <BtnUp>:        NotifyScroll(Proportional) EndScroll()

CONTROL SEQUENCES AND KEYBOARD

       Applications can send sequences of characters to the  terminal  to  change  its  behavior.
       Often they are referred to as “ANSI escape sequences” or just plain “escape sequences” but
       both terms are misleading:

       ·   ANSI x3.64 (obsolete) which was replaced by ISO 6429  (ECMA-48)  gave  rules  for  the
           format of these sequences of characters.

       ·   While  the  original VT100 was claimed to be ANSI-compatible (against x3.64), there is
           no freely available version of the ANSI standard to  show  where  the  VT100  differs.
           Most  of the documents which mention the ANSI standard have additions not found in the
           original (such as those based on ansi.sys).  So this discussion  focuses  on  the  ISO
           standards.

       ·   The standard describes only sequences sent from the host to the terminal.  There is no
           standard for sequences sent by special  keys  from  the  terminal  to  the  host.   By
           convention  (and  referring  to  existing  terminals),  the  format of those sequences
           usually conforms to the host-to-terminal standard.

       ·   Some of xterm's sequences do not fit into the standard scheme.  Technically those  are
           “unspecified”.   As  an  example,  DEC  Screen  Alignment Test (DECALN) is this three-
           character sequence:

               ESC # 8

       ·   Some sequences fit into the standard format, but  are  not  listed  in  the  standard.
           These  include  the  sequences  used  for  setting  up  scrolling  margins  and  doing
           forward/reverse scrolling.

       ·   Some of the sequences (in particular, the single-character functions such as  tab  and
           backspace) do not include the escape character.

       With all of that in mind, the standard refers to these sequences of characters as “control
       sequences”.

       The Xterm Control Sequences document lists the control sequences which an application  can
       send  xterm  to  make  it  perform  various  operations.   Most  of  these  operations are
       standardized, from either the DEC  or  Tektronix  terminals,  or  from  more  widely  used
       standards such as ISO-6429.

       A few examples of usage are given in this section.

   Window Titles
       Some  scripts  use  echo  with options -e and -n to tell the shell to interpret the string
       “\e” as the escape character and to suppress a trailing newline on output.  Those are  not
       portable, not recommended.  Instead, use printf (POSIX).

       For  example,  to  set  the  window  title  to  “Hello world!”, you could use one of these
       commands in a script:

           printf '\033]2;Hello world!\033\'
           printf '\033]2;Hello world!\007'
           printf '\033]2;%s\033\' "Hello world!"
           printf '\033]2;%s\007' "Hello world!"

       The printf command interprets the octal value “\033” for escape, and  (since  it  was  not
       given in the format) omits a trailing newline from the output.

       Some programs (such as screen(1)) set both window- and icon-titles at the same time, using
       a slightly different control sequence.

   Special Keys
       Xterm, like any VT100-compatible terminal emulator, has two modes  for  the  special  keys
       (cursor-keys, numeric keypad, and certain function-keys):

       ·   normal  mode,  which  makes  the  special keys transmit “useful” sequences such as the
           control sequence for cursor-up when pressing the up-arrow, and

       ·   application mode, which uses a different control sequence that cannot be mistaken  for
           the “useful” sequences.

       The  main  difference  between  the two modes is that normal mode sequences start with CSI
       (escape [) and application mode sequences start with SS3 (escape O).

       The terminal is initialized into one of these two modes (usually the normal  mode),  based
       on  the  terminal  description  (termcap  or terminfo).  The terminal description also has
       capabilities (strings) defined for the keypad mode used in curses applications.

       There is a problem in using  the  terminal  description  for  applications  that  are  not
       intended  to  be full-screen curses applications: the definitions of special keys are only
       correct for this keypad mode.  For example, some shells (unlike ksh(1), which  appears  to
       be  hard-coded,  not  even  using  termcap)  allow  their users to customize key-bindings,
       assigning shell actions to special keys.

       ·   bash(1) allows constant strings to be assigned to functions.  This is only  successful
           if  the  terminal  is  initialized  to application mode by default, because bash lacks
           flexibility in this area.  It uses a (less expressive than bash's) readline  scripting
           language  for  setting  up  key  bindings,  which  relies  upon the user to statically
           enumerate the possible bindings for given values of $TERM.

       ·   zsh(1) provides an analogous feature, but it accepts runtime expressions, as  well  as
           providing  a  $terminfo  array  for  scripts.  In particular, one can use the terminal
           database, transforming when defining a key-binding.  By  transforming  the  output  so
           that  CSI  and  SS3  are  equated,  zsh can use the terminal database to obtain useful
           definitions for its command-line use regardless of whether the terminal uses normal or
           application mode initially.  Here is an example:

               [[ "$terminfo[kcuu1]" == "^[O"* ]] && \
               bindkey -M viins "${terminfo[kcuu1]/O/[}" \
               vi-up-line-or-history

   Changing Colors
       A few shell programs provide the ability for users to add color and other video attributes
       to the shell prompt strings.  Users can do  this  by  setting  $PS1  (the  primary  prompt
       string).   Again,  bash  and  zsh  have  provided  features  not found in ksh.  There is a
       problem, however: the prompt's width on the screen will not necessarily be the same as the
       number  of  characters.   Because  there  is no guidance in the POSIX standard, each shell
       addresses the problem in a different way:

       ·   bash treats characters within “\[” and “\]” as nonprinting  (using  no  width  on  the
           screen).

       ·   zsh treats characters within “%{” and “%}” as nonprinting.

       In  addition  to  the  difference  in  syntax,  the  shells  provide different methods for
       obtaining useful escape sequences:

       ·   As noted in Special Keys, zsh  initializes  the  $terminfo  array  with  the  terminal
           capabilities.

           It  also  provides  a  function  echoti which works like tput(1) to convert a terminal
           capability with its parameters into a string that can be written to the terminal.

       ·   Shells lacking a comparable feature (such as bash) can always use the program tput  to
           do this transformation.

       Hard-coded  escape  sequences are supported by each shell, but are not recommended because
       those rely upon particular configurations and cannot be  easily  moved  between  different
       user environments.

ENVIRONMENT

       Xterm sets several environment variables:

       DISPLAY
            is the display name, pointing to the X server (see DISPLAY NAMES in X(7)).

       TERM is set according to the terminfo (or termcap) entry which it is using as a reference.

            On some systems, you may encounter situations where the shell which you use and xterm
            are built using libraries with different  terminal  databases.   In  that  situation,
            xterm may choose a terminal description not known to the shell.

       WINDOWID
            is set to the X window id number of the xterm window.

       XTERM_FILTER
            is set if a locale-filter is used.  The value is the pathname of the filter.

       XTERM_LOCALE
            shows  the  locale  which  was  used  by xterm on startup.  Some shell initialization
            scripts may set a different locale.

       XTERM_SHELL
            is set to the pathname of the program which is invoked.   Usually  that  is  a  shell
            program,  e.g.,  /bin/sh.  Since it is not necessarily a shell program however, it is
            distinct from “SHELL”.

       XTERM_VERSION
            is set to the  string  displayed  by  the  -version  option.   That  is  normally  an
            identifier  for the X Window libraries used to build xterm, followed by xterm's patch
            number in parenthesis.  The patch number is also part of the response to a  Secondary
            Device Attributes (DA) control sequence (see Xterm Control Sequences).

       Depending on your system configuration, xterm may also set the following:

       COLUMNS
            the width of the xterm in characters (cf: “stty columns”).

       HOME when xterm is configured to update utmp.

       LINES
            the height of the xterm in characters (cf: “stty rows”).

       LOGNAME
            when xterm is configured to update utmp.

       SHELL
            when xterm is configured to update utmp.  It is also set if you provide a valid shell
            name as the optional parameter.

            Xterm sets this to an absolute pathname.  If you have set the variable to a  relative
            pathname, xterm may set it to a different shell pathname.

            If you have set this to an pathname which does not correspond to a valid shell, xterm
            may unset it, to avoid confusion.

       TERMCAP
            the contents of the termcap entry corresponding to  $TERM,  with  lines  and  columns
            values substituted for the actual size window you have created.

       TERMINFO
            may be defined to a nonstandard location in the configure script.

FILES

       The actual pathnames given may differ on your system.

       /etc/shells
            contains  a  list  of  valid  shell  programs, used by xterm to decide if the “SHELL”
            environment variable should be set for the process started by xterm.

       /var/run/utmp
            the system logfile, which records user logins.

       /var/log/wtmp
            the system logfile, which records user logins and logouts.

       /etc/X11/app-defaults/XTerm
            the xterm default application resources.

       /etc/X11/app-defaults/XTerm-color
            the xterm color application resources.  If your display supports color, use this
                      *customization: -color
            in your  .Xdefaults  file  to  automatically  use  this  resource  file  rather  than
            /etc/X11/app-defaults/XTerm.   If  you  do  not  do  this, xterm uses its compiled-in
            default resource settings for colors.

       /usr/share/pixmaps
            the directory in which xterm's pixmap icon files are installed.

ERROR MESSAGES

       Most of the fatal error messages from xterm use the following format:
              xterm: Error XXX, errno YYY: ZZZ
       The XXX codes (which are used by xterm as its exit-code) are listed below,  with  a  brief
       explanation.

       1    is used for miscellaneous errors, usually accompanied by a specific message,

       11   ERROR_FIONBIO
            main: ioctl() failed on FIONBIO

       12   ERROR_F_GETFL
            main: ioctl() failed on F_GETFL

       13   ERROR_F_SETFL
            main: ioctl() failed on F_SETFL

       14   ERROR_OPDEVTTY
            spawn: open() failed on /dev/tty

       15   ERROR_TIOCGETP
            spawn: ioctl() failed on TIOCGETP

       17   ERROR_PTSNAME
            spawn: ptsname() failed

       18   ERROR_OPPTSNAME
            spawn: open() failed on ptsname

       19   ERROR_PTEM
            spawn: ioctl() failed on I_PUSH/"ptem"

       20   ERROR_CONSEM
            spawn: ioctl() failed on I_PUSH/"consem"

       21   ERROR_LDTERM
            spawn: ioctl() failed on I_PUSH/"ldterm"

       22   ERROR_TTCOMPAT
            spawn: ioctl() failed on I_PUSH/"ttcompat"

       23   ERROR_TIOCSETP
            spawn: ioctl() failed on TIOCSETP

       24   ERROR_TIOCSETC
            spawn: ioctl() failed on TIOCSETC

       25   ERROR_TIOCSETD
            spawn: ioctl() failed on TIOCSETD

       26   ERROR_TIOCSLTC
            spawn: ioctl() failed on TIOCSLTC

       27   ERROR_TIOCLSET
            spawn: ioctl() failed on TIOCLSET

       28   ERROR_INIGROUPS
            spawn: initgroups() failed

       29   ERROR_FORK
            spawn: fork() failed

       30   ERROR_EXEC
            spawn: exec() failed

       32   ERROR_PTYS
            get_pty: not enough ptys

       34   ERROR_PTY_EXEC
            waiting for initial map

       35   ERROR_SETUID
            spawn: setuid() failed

       36   ERROR_INIT
            spawn: can't initialize window

       46   ERROR_TIOCKSET
            spawn: ioctl() failed on TIOCKSET

       47   ERROR_TIOCKSETC
            spawn: ioctl() failed on TIOCKSETC

       49   ERROR_LUMALLOC
            luit: command-line malloc failed

       50   ERROR_SELECT
            in_put: select() failed

       54   ERROR_VINIT
            VTInit: can't initialize window

       57   ERROR_KMMALLOC1
            HandleKeymapChange: malloc failed

       60   ERROR_TSELECT
            Tinput: select() failed

       64   ERROR_TINIT
            TekInit: can't initialize window

       71   ERROR_BMALLOC2
            SaltTextAway: malloc() failed

       80   ERROR_LOGEXEC
            StartLog: exec() failed

       83   ERROR_XERROR
            xerror: XError event

       84   ERROR_XIOERROR
            xioerror: X I/O error

       85   ERROR_ICEERROR
            ICE I/O error

       90   ERROR_SCALLOC
            Alloc: calloc() failed on base

       91   ERROR_SCALLOC2
            Alloc: calloc() failed on rows

       102  ERROR_SAVE_PTR
            ScrnPointers: malloc/realloc() failed

BUGS

       Large  pastes do not work on some systems.  This is not a bug in xterm; it is a bug in the
       pseudo terminal driver of those systems.  Xterm feeds large pastes to the pty only as fast
       as the pty will accept data, but some pty drivers do not return enough information to know
       if the write has succeeded.

       When connected to an input method, it is possible for xterm to hang if the XIM  server  is
       suspended or killed.

       Many of the options are not resettable after xterm starts.

       This  program still needs to be rewritten.  It should be split into very modular sections,
       with the various emulators being completely separate widgets that do not know  about  each
       other.   Ideally, you'd like to be able to pick and choose emulator widgets and stick them
       into a single control widget.

       There needs to be a dialog box to allow entry of the Tek COPY file name.

SEE ALSO

       resize(1), luit(1), uxterm(1), X(7), pty(4), tty(4)

       Xterm Control Sequences (this is the file ctlseqs.ms).

       http://invisible-island.net/xterm/xterm.html
       http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
       http://invisible-island.net/xterm/xterm.faq.html

AUTHORS

       Far too many people, including:

       Loretta Guarino Reid (DEC-UEG-WSL), Joel McCormack (DEC-UEG-WSL), Terry Weissman (DEC-UEG-
       WSL),  Edward  Moy (Berkeley), Ralph R. Swick (MIT-Athena), Mark Vandevoorde (MIT-Athena),
       Bob McNamara (DEC-MAD), Jim Gettys (MIT-Athena), Bob Scheifler (MIT  X  Consortium),  Doug
       Mink  (SAO),  Steve  Pitschke  (Stellar),  Ron  Newman  (MIT-Athena),  Jim  Fulton  (MIT X
       Consortium), Dave Serisky (HP), Jonathan Kamens (MIT-Athena),  Jason  Bacon,  Ross  Combs,
       Stephen P. Wall, David Wexelblat, and Thomas Dickey (invisible-island.net).