Provided by: groff-base_1.18.1.1-22build1_i386 bug


       grotty - groff driver for typewriter-like devices


       grotty [ -bBcdfhiouUv ] [ -Fdir ] [ files... ]

       It  is  possible  to  have  whitespace  between  the  -F option and its


       grotty translates the output of GNU troff  into  a  form  suitable  for
       typewriter-like  devices.   Normally  grotty should be invoked by using
       the groff command with  a  -Tascii,  -Tascii8,  -Tlatin1,  -Tnippon  or
       -Tutf8  option  on ASCII based systems, and with -Tcp1047 and -Tutf8 on
       EBCDIC based hosts.  If no  files  are  given,  grotty  will  read  the
       standard  input.   A  filename  of - will also cause grotty to read the
       standard input.  Output is written to the standard output.

       By default, grotty emits SGR escape  sequences  (from  ISO  6429,  also
       called  ANSI  color  escapes)  to change text attributes (bold, italic,
       colors).  This makes it possible to have eight different background and
       foreground colors; additionally, bold and italic attributes can be used
       at the same time (by using the BI font).

       The following colors are defined in tty.tmac: black, white, red, green,
       blue,  yellow, magenta, cyan.  Unknown colors are mapped to the default
       color (which is dependent on the settings  of  the  terminal;  in  most
       cases,  this is black for the foreground and white for the background).

       Use the -c switch to revert to  the  old  behaviour,  printing  a  bold
       character c with the sequence ‘c BACKSPACE c’ and an italic character c
       by the sequence ‘_ BACKSPACE c’.  At the same  time,  color  output  is
       disabled.   The  same  effect  can  be  achieved  by setting either the
       GROFF_NO_SGR environment variable or using the  ‘sgr’  X  command  (see

       For  SGR  support,  it  is necessary to use the -R option of less(1) to
       disable   the   interpretation   of   grotty’s   old   output   format.
       Consequently,  all programs which use less as the pager program have to
       pass this option to it.  For man(1) in particular, either add -R to the
       $PAGER environment variable, e.g.

              PAGER="/usr/bin/less -R"
              export PAGER

       or  use  the  -P  option  of  man  to  set the pager executable and its
       options, or modify the configuration file of man in a similar  fashion.

       grotty’s  old  output  format  can be displayed on a terminal by piping
       through ul(1).  Pagers such as more(1) or  less(1)  are  also  able  to
       display these sequences.  Use either -B or -U when piping into less(1);
       use -b when piping into more(1).  There is no need to filter the output
       through col(1) since grotty never outputs reverse line feeds.

       The font description file may contain a command

              internalname n

       where n is a decimal integer.  If the 01 bit in n is set, then the font
       will be treated as an italic font; if the 02 bit is set, then  it  will
       be  treated  as  a  bold  font.  The code field in the font description
       field gives the code which will be used to output the character.   This
       code can also be used in the \N escape sequence in troff.


       -b     Suppress  the  use of overstriking for bold characters.  Ignored
              if -c isn’t used.

       -B     Use only overstriking for bold-italic characters.  Ignored if -c
              isn’t used.

       -c     Use  grotty’s old output format (see above).  This also disables
              color output.

       -d     Ignore  all  \D  commands.   Without  this  grotty  will  render
              \Dl...’  commands  that have at least one zero argument (and so
              are either horizontal or vertical) using -, |, and + characters.

       -f     Use form feeds in the output.  A form feed will be output at the
              end of each page that has no output on its last line.

       -Fdir  Prepend directory dir/devname to the search path  for  font  and
              device  description  files;  name  is  the  name  of the device,
              usually ascii, ascii8, latin1, utf8, nippon or cp1047.

       -h     Use horizontal tabs in the output.  Tabs are assumed to  be  set
              every 8 columns.

       -i     Use escape sequences to set the italic text attribute instead of
              the underline attribute for italic fonts (‘I’ and  ‘BI’).   Note
              that  most  terminals  (including  xterm)  don’t  support  this.
              Ignored if -c is active.

       -o     Suppress  overstriking  (other  than  for  bold  or   underlined
              characters in case the old output format has been activated with

       -u     Suppress the use of underlining for italic characters.   Ignored
              if -c isn’t used.

       -U     Use  only underlining for bold-italic characters.  Ignored if -c
              isn’t used.

       -v     Print the version number.


       grotty understands a single X command  produced  using  the  \X  escape

       \Xtty: sgr n’
              If  n  is  non-zero  or  missing, enable SGR output (this is the
              default), otherwise use the old  drawing  scheme  for  bold  and


              If set, the old drawing scheme for bold and underline (using the
              backspace character) is active.  Colors are disabled.


              Device description file for ascii device.

              Font description file for font F of ascii device.

              Device description file for ascii8 device.

              Device description file for latin1 device.

              Device description file for nippon device.

              Font description file for font F of latin1 device.

              Device description file for utf8 device.

              Font description file for font F of utf8 device.

              Device description file for cp1047 device.

              Font description file for font F of cp1047 device.

              Macros for use with grotty.

              Additional klugdey character definitions for use with grotty.

       Note that on EBCDIC hosts, only files for the  cp1047  device  will  be


       grotty is intended only for simple documents.

       There is no support for fractional horizontal or vertical motions.

       There  is no support for \D commands other than horizontal and vertical

       Characters above the first line (ie with  a  vertical  position  of  0)
       cannot be printed.

       Color  handling  is different compared to grops(1).  \M doesn’t set the
       fill color for closed graphic objects  (which  grotty  doesn’t  support
       anyway)  but  changes  the  background  color  of  the  character cell,
       affecting all subsequent operations.


       groff(1), troff(1), groff_out(5), groff_font(5), groff_char(7),  ul(1),
       more(1), man(1), less(1)