Provided by: nano_7.2-2ubuntu0.1_amd64 bug

NAME

       nanorc - GNU nano's configuration file

DESCRIPTION

       The  nanorc files contain the default settings for nano, a small and friendly editor.  During startup, if
       --rcfile is not given, nano will read two files: first the system-wide settings,  from  /etc/nanorc  (the
       exact path might be different on your system), and then the user-specific settings, either from ~/.nanorc
       or from $XDG_CONFIG_HOME/nano/nanorc or from ~/.config/nano/nanorc, whichever is encountered  first.   If
       --rcfile is given, nano will read just the specified settings file.

OPTIONS

       The configuration file accepts a series of set and unset commands, which can be used to configure nano on
       startup without using command-line options.  Additionally, there  are  some  commands  to  define  syntax
       highlighting  and  to  rebind keys -- see the two separate sections on those.  nano reads one command per
       line.  All commands and keywords should be written in lowercase.

       Options in nanorc files take precedence over nano's defaults, and command-line  options  override  nanorc
       settings.   Also,  options that do not take an argument are unset by default.  So using the unset command
       is only needed when wanting to override a setting of  the  system's  nanorc  file  in  your  own  nanorc.
       Options that take an argument cannot be unset.

       Quotes  inside the characters  parameters below should not be escaped.  The last double quote on the line
       will be seen as the closing quote.

       The supported commands and arguments are:

       set afterends
          Make Ctrl+Right and Ctrl+Delete stop at word ends instead of beginnings.

       set allow_insecure_backup
          When backing up files, allow the backup to succeed even if its permissions can't  be  (re)set  due  to
          special OS considerations.  You should NOT enable this option unless you are sure you need it.

       set atblanks
          When  soft  line wrapping is enabled, make it wrap lines at blank characters (tabs and spaces) instead
          of always at the edge of the screen.

       set autoindent
          Automatically indent a newly created line to the same number of tabs and/or  spaces  as  the  previous
          line (or as the next line if the previous line is the beginning of a paragraph).

       set backup
          When saving a file, create a backup file by adding a tilde (~) to the file's name.

       set backupdir directory
          Make and keep not just one backup file, but make and keep a uniquely numbered one every time a file is
          saved -- when backups are enabled with set backup or --backup or -B.  The uniquely numbered files  are
          stored in the specified directory.

       set boldtext
          Use  bold  instead  of  reverse  video  for the title bar, status bar, key combos, function tags, line
          numbers, and selected text.  This can be overridden by setting the  options  titlecolor,  statuscolor,
          keycolor, functioncolor, numbercolor, and selectedcolor.

       set bookstyle
          When  justifying,  treat  any line that starts with whitespace as the beginning of a paragraph (unless
          auto-indenting is on).

       set brackets "characters"
          Set the characters treated as closing brackets when justifying paragraphs.  This may not include blank
          characters.   Only  closing  punctuation (see set punct), optionally followed by the specified closing
          brackets, can end sentences.  The default value is ""')>]}".

       set breaklonglines
          Automatically hard-wrap the current line when it becomes overlong.

       set casesensitive
          Do case-sensitive searches by default.

       set constantshow
          Constantly display the cursor position in the status bar.  This overrides the option quickblank.

       set cutfromcursor
          Use cut-from-cursor-to-end-of-line by default, instead of cutting the whole line.

       set emptyline
          Do not use the line below the title bar, leaving it entirely blank.

       set errorcolor [bold,][italic,]fgcolor,bgcolor
          Use this color combination for the status bar when an error message is displayed.  The  default  value
          is bold,white,red.  See set titlecolor for valid color names.

       set fill number
          Set  the  target  width  for justifying and automatic hard-wrapping at this number of columns.  If the
          value is 0 or less, wrapping will occur at the width of the screen minus number columns, allowing  the
          wrap  point to vary along with the width of the screen if the screen is resized.  The default value is
          -8.

       set functioncolor [bold,][italic,]fgcolor,bgcolor
          Use this color combination for the concise function descriptions in the two help lines at  the  bottom
          of the screen.  See set titlecolor for more details.

       set guidestripe number
          Draw  a  vertical  stripe at the given column, to help judge the width of the text.  (The color of the
          stripe can be changed with set stripecolor.)

       set historylog
          Save the last hundred search strings and replacement strings and executed commands,  so  they  can  be
          easily reused in later sessions.

       set indicator
          Display a "scrollbar" on the righthand side of the edit window.  It shows the position of the viewport
          in the buffer and how much of the buffer is covered by the viewport.

       set jumpyscrolling
          Scroll the buffer contents per half-screen instead of per line.

       set keycolor [bold,][italic,]fgcolor,bgcolor
          Use this color combination for the shortcut key combos in the two help lines  at  the  bottom  of  the
          screen.  See set titlecolor for more details.

       set linenumbers
          Display  line numbers to the left of the text area.  (Any line with an anchor additionally gets a mark
          in the margin.)

       set locking
          Enable vim-style lock-files for when editing files.

       set magic
          When neither the file's name nor its first line give a clue,  try  using  libmagic  to  determine  the
          applicable  syntax.   (Calling libmagic can be relatively time consuming.  It is therefore not done by
          default.)

       set matchbrackets "characters"
          Specify the opening and closing brackets that can be found by bracket searches.  This may not  include
          blank  characters.   The opening set must come before the closing set, and the two sets must be in the
          same order.  The default value is "(<[{)>]}".

       set minibar
          Suppress the title bar and instead show information about the current buffer  at  the  bottom  of  the
          screen,  in  the  space  for  the  status  bar.   In this "minibar" the filename is shown on the left,
          followed by an asterisk if the buffer has been modified.  On the right are displayed the current  line
          and  column  number,  the code of the character under the cursor (in Unicode format: U+xxxx), the same
          flags as are shown by set stateflags, and a percentage that expresses how far the cursor is  into  the
          file  (linewise).  When a file is loaded or saved, and also when switching between buffers, the number
          of lines in the buffer is displayed after  the  filename.   This  number  is  cleared  upon  the  next
          keystroke,  or  replaced  with  an [i/n] counter when multiple buffers are open.  The line plus column
          numbers and the character code are displayed only when set constantshow is used, and can be toggled on
          and off with M-C.  The state flags are displayed only when set stateflags is used.

       set minicolor [bold,][italic,]fgcolor,bgcolor
          Use  this  color  combination  for the minibar.  (When this option is not specified, the colors of the
          title bar are used.)  See set titlecolor for more details.

       set mouse
          Enable mouse support, if available for your system.  When enabled, mouse clicks can be used  to  place
          the  cursor,  set the mark (with a double click), and execute shortcuts.  The mouse will work in the X
          Window System, and on the console when gpm is running.  Text can still be selected through dragging by
          holding down the Shift key.

       set multibuffer
          When reading in a file with ^R, insert it into a new buffer by default.

       set noconvert
          Don't convert files from DOS/Mac format.

       set nohelp
          Don't display the two help lines at the bottom of the screen.

       set nonewlines
          Don't automatically add a newline when a text does not end with one.  (This can cause you to save non-
          POSIX text files.)

       set nowrap
          Deprecated option since it has become the default setting.   When  needed,  use  unset  breaklonglines
          instead.

       set numbercolor [bold,][italic,]fgcolor,bgcolor
          Use this color combination for line numbers.  See set titlecolor for more details.

       set operatingdir directory
          nano  will  only  read  and  write  files  inside directory and its subdirectories.  Also, the current
          directory is changed to here, so files are inserted from this directory.  By  default,  the  operating
          directory feature is turned off.

       set positionlog
          Save the cursor position of files between editing sessions.  The cursor position is remembered for the
          200 most-recently edited files.

       set preserve
          Preserve the XON and XOFF keys (^Q and ^S).

       set promptcolor [bold,][italic,]fgcolor,bgcolor
          Use this color combination for the prompt bar.  (When this option is not specified, the colors of  the
          title bar are used.)  See set titlecolor for more details.

       set punct "characters"
          Set  the  characters  treated as closing punctuation when justifying paragraphs.  This may not include
          blank characters.  Only the specfified closing punctuation, optionally followed  by  closing  brackets
          (see brackets), can end sentences.  The default value is "!.?".

       set quickblank
          Make  status-bar  messages  disappear  after  1  keystroke  instead  of  after  20.   Note that option
          constantshow overrides this.  When option minibar or zero is in effect,  quickblank  makes  a  message
          disappear after 0.8 seconds instead of after the default 1.5 seconds.

       set quotestr "regex"
          Set  the  regular  expression  for  matching  the  quoting  part  of  a  line.   The  default value is
          "^([ \t]*([!#%:;>|}]|//))+".  (Note that \t stands for  an  actual  Tab  character.)   This  makes  it
          possible  to  rejustify  blocks  of  quoted  text  when  composing email, and to rewrap blocks of line
          comments when writing source code.

       set rawsequences
          Interpret escape sequences directly, instead of asking ncurses to translate them.  (If you  need  this
          option to get some keys to work properly, it means that the terminfo terminal description that is used
          does not fully match the actual behavior of your terminal.  This can happen when you ssh  into  a  BSD
          machine, for example.)  Using this option disables nano's mouse support.

       set rebinddelete
          Interpret  the  Delete and Backspace keys differently so that both Backspace and Delete work properly.
          You should only use this option when on your system either Backspace acts like Delete or  Delete  acts
          like Backspace.

       set regexp
          Do  regular-expression  searches  by  default.   Regular  expressions in nano are of the extended type
          (ERE).

       set saveonexit
          Save a changed buffer automatically on exit (^X); don't prompt.

       set scrollercolor fgcolor,bgcolor
          Use this color combination for the indicator alias "scrollbar".  (On terminal emulators that link to a
          libvte  older  than  version  0.55,  using  a background color here does not work correctly.)  See set
          titlecolor for more details.

       set selectedcolor [bold,][italic,]fgcolor,bgcolor
          Use this color combination for selected text.  See set titlecolor for more details.

       set showcursor
          Put the cursor on the highlighted item in the file browser, and show the cursor in the help viewer, to
          aid braille users and people with poor vision.

       set smarthome
          Make  the Home key smarter.  When Home is pressed anywhere but at the very beginning of non-whitespace
          characters on a line, the cursor will jump to that beginning (either forwards or backwards).   If  the
          cursor is already at that position, it will jump to the true beginning of the line.

       set softwrap
          Display  lines  that  exceed  the screen's width over multiple screen lines.  (You can make this soft-
          wrapping occur at whitespace instead of rudely at the screen's edge, by using also set atblanks.)

       set speller "program [argument ...]"
          Use the given program to do spell checking and correcting, instead of  using  the  built-in  corrector
          that calls hunspell(1) or spell(1).

       set spotlightcolor [bold,][italic,]fgcolor,bgcolor
          Use  this  color combination for highlighting a search match.  The default value is black,lightyellow.
          See set titlecolor for valid color names.

       set stateflags
          Use the top-right corner of the screen for showing some state flags: I when auto-indenting, M when the
          mark  is  on,  L  when hard-wrapping (breaking long lines), R when recording a macro, and S when soft-
          wrapping.  When the buffer is modified, a star (*) is shown after the filename in the  center  of  the
          title bar.

       set statuscolor [bold,][italic,]fgcolor,bgcolor
          Use this color combination for the status bar.  See set titlecolor for more details.

       set stripecolor [bold,][italic,]fgcolor,bgcolor
          Use this color combination for the vertical guiding stripe.  See set titlecolor for more details.

       set tabsize number
          Use  a  tab size of number columns.  The value of number must be greater than 0.  The default value is
          8.

       set tabstospaces
          Convert each typed tab to spaces -- to the number of spaces that a tab at that position would take up.

       set titlecolor [bold,][italic,]fgcolor,bgcolor
          Use this color combination for the title bar.  Valid names for the foreground  and  background  colors
          are:  red,  green,  blue,  magenta,  yellow, cyan, white, and black.  Each of these eight names may be
          prefixed with the word light to get a brighter version of that color.  The word grey or  gray  may  be
          used  as a synonym for lightblack.  On terminal emulators that can do at least 256 colors, other valid
          (but unprefixable) color names are: pink, purple, mauve, lagoon, mint,  lime,  peach,  orange,  latte,
          rosy,  beet,  plum, sea, sky, slate, teal, sage, brown, ocher, sand, tawny, brick, crimson, and normal
          -- where normal means the default foreground or background color.  On such emulators,  the  color  may
          also  be  specified  as a three-digit hexadecimal number prefixed with #, with the digits representing
          the amounts of red, green, and blue, respectively.  This tells  nano  to  select  from  the  available
          palette the color that approximates the given values.

          Either  "fgcolor"  or  ",bgcolor"  may be left out, and the pair may be preceded by bold and/or italic
          (separated by commas) to get a bold and/or slanting typeface, if your terminal can do those.

       set trimblanks
          Remove trailing whitespace from wrapped lines when automatic hard-wrapping  occurs  or  when  text  is
          justified.

       set unix
          Save a file by default in Unix format.  This overrides nano's default behavior of saving a file in the
          format that it had.  (This option has no effect when you also use set noconvert.)

       set whitespace "characters"
          Set the two characters used to indicate the presence of tabs and spaces.  They must  be  single-column
          characters.  The default pair for a UTF-8 locale is "»⋅", and for other locales ">.".

       set wordbounds
          Detect word boundaries differently by treating punctuation characters as parts of words.

       set wordchars "characters"
          Specify which other characters (besides the normal alphanumeric ones) should be considered as parts of
          words.  When using this option, you probably want to unset wordbounds.

       set zap
          Let an unmodified Backspace or Delete erase the marked region (instead  of  a  single  character,  and
          without affecting the cutbuffer).

       set zero
          Hide  all  elements  of  the interface (title bar, status bar, and help lines) and use all rows of the
          terminal for showing the contents of the buffer.   The  status  bar  appears  only  when  there  is  a
          significant  message, and disappears after 1.5 seconds or upon the next keystroke.  With M-Z the title
          bar plus status bar can be toggled.  With M-X the help lines.

NOTES

       Option set suspendable has been removed.  Suspension is enabled by default, reachable via ^T^Z.  (If  you
       want a plain ^Z to suspend nano, add bind ^Z suspend main to your nanorc.)

SYNTAX HIGHLIGHTING

       Coloring  the  different  syntactic  elements  of  a  file is done via regular expressions (see the color
       command below).  This is inherently imperfect, because regular expressions are  not  powerful  enough  to
       fully  parse  a file.  Nevertheless, regular expressions can do a lot and are easy to make, so they are a
       good fit for a small editor like nano.

       All regular expressions in nano are POSIX extended regular expressions.  This means that ., ?, *,  +,  ^,
       $,  and  several  other  characters  are special.  The period . matches any single character, ? means the
       preceding item is optional, * means the preceding item may be matched zero or more  times,  +  means  the
       preceding  item  must  be matched one or more times, ^ matches the beginning of a line, and $ the end, \<
       matches the start of a word, and \> the end, and \s matches a blank.  It also means  that  lookahead  and
       lookbehind  are  not  possible.   A complete explanation can be found in the manual page of GNU grep: man
       grep.

       Each regular expression in a nanorc file should be wrapped  in  double  quotes  ("").   Multiple  regular
       expressions  can  follow  each other on a line by separating them with blanks.  This means that a regular
       expression cannot contain a double quote followed by a blank.  When you need this  combination  inside  a
       regular expression, then either the double quote or the blank should be put between square brackets ([]).

       For each kind of file a separate syntax can be defined via the following commands:

       syntax name ["fileregex" ...]
              Start  the  definition  of  a syntax with this name.  All subsequent color and other such commands
              will be added to this syntax, until a new syntax command is encountered.

              When nano is run, this syntax will be automatically activated if the current filename matches  the
              extended  regular expression fileregex.  Or the syntax can be explicitly activated by using the -Y
              or --syntax command-line option followed by the name.

              The syntax default is special: it takes no fileregex, and applies to files that  don't  match  any
              syntax's  regexes.   The syntax none is reserved; specifying it on the command line is the same as
              not having a syntax at all.

       header "regex" ...
              If from all defined syntaxes no fileregex matched, then compare this regex  (or  regexes)  against
              the first line of the current file, to determine whether this syntax should be used for it.

       magic "regex" ...
              If  no  fileregex matched and no header regex matched either, then compare this regex (or regexes)
              against the result of querying the magic database about the current  file,  to  determine  whether
              this  syntax  should be used for it.  (This functionality only works when libmagic is installed on
              the system and will be silently ignored otherwise.)

       formatter program [argument ...]
              Run the given program on the full contents of the current buffer.

       linter program [argument ...]
              Use the given program to run a syntax check on the current buffer.

       comment "string"
              Use the given string for commenting and uncommenting lines.  If the string contains a vertical bar
              or pipe character (|), this designates bracket-style comments; for example, "/*|*/" for CSS files.
              The characters before the pipe are prepended to the line and the characters  after  the  pipe  are
              appended  at  the end of the line.  If no pipe character is present, the full string is prepended;
              for example, "#" for Python files.  If empty double quotes are  specified,  the  comment/uncomment
              function is disabled; for example, "" for JSON.  The default value is "#".

       tabgives "string"
              Make  the  <Tab>  key produce the given string.  Useful for languages like Python that want to see
              only spaces for indentation.  This overrides the setting of the tabstospaces option.

       color [bold,][italic,]fgcolor,bgcolor "regex" ...
              Paint all pieces of text  that  match  the  extended  regular  expression  regex  with  the  given
              foreground and background colors, at least one of which must be specified.  Valid color names are:
              red, green, blue, magenta, yellow, cyan, white, and black.  Each  of  these  eight  names  may  be
              prefixed  with  the word light to get a brighter version of that color.  The word grey or gray may
              be used as a synonym for lightblack.  On terminal emulators that can do at least 256 colors, other
              valid  (but unprefixable) color names are: pink, purple, mauve, lagoon, mint, lime, peach, orange,
              latte, rosy, beet, plum, sea, sky, slate, teal, sage, brown, ocher, sand, tawny,  brick,  crimson,
              and  normal  -- where normal means the default foreground or background color.  On such emulators,
              the color may also be specified as a three-digit hexadecimal number  prefixed  with  #,  with  the
              digits  representing the amounts of red, green, and blue, respectively.  This tells nano to select
              from the available palette the color that approximates the given values.

              The color pair may be preceded by bold and/or italic (separated by commas) to get  a  bold  and/or
              slanting typeface, if your terminal can do those.

              All coloring commands are applied in the order in which they are specified, which means that later
              commands can recolor stuff that was colored earlier.

       icolor [bold,][italic,]fgcolor,bgcolor "regex" ...
              Same as above, except that the matching is case insensitive.

       color [bold,][italic,]fgcolor,bgcolor start="fromrx" end="torx"
              Paint all pieces of text whose start matches extended regular  expression  fromrx  and  whose  end
              matches extended regular expression torx with the given foreground and background colors, at least
              one of which must be specified.  This means that, after an initial instance of  fromrx,  all  text
              until  the  first  instance  of  torx  will  be  colored.  This allows syntax highlighting to span
              multiple lines.

       icolor [bold,][italic,]fgcolor,bgcolor start="fromrx" end="torx"
              Same as above, except that the matching is case insensitive.

       include "syntaxfile"
              Read in self-contained color syntaxes from syntaxfile.  Note that syntaxfile may contain only  the
              above commands, from syntax to icolor.

       extendsyntax name command argument ...
              Extend  the  syntax  previously  defined  as  name with another command.  This allows adding a new
              color, icolor, header, magic, formatter, linter,  comment,  or  tabgives  command  to  an  already
              defined  syntax -- useful when you want to slightly improve a syntax defined in one of the system-
              installed files (which normally are not writable).

REBINDING KEYS

       Key bindings can be changed via the following three commands:

          bind key function menu
                 Rebinds the given key to the given function in the given  menu  (or  in  all  menus  where  the
                 function exists when all is used).

          bind key "string" menu
                 Makes  the  given key produce the given string in the given menu (or in all menus where the key
                 exists when all is used).  Besides literal text and/or control codes, the  string  may  contain
                 function  names  between  braces.   These  functions will be invoked when the key is typed.  To
                 include a literal opening brace, use {{}.

          unbind key menu
                 Unbinds the given key from the given menu (or from all menus where the key exists when  all  is
                 used).

       Note  that bind key "{function}" menu is equivalent to bind key function menu, except that for the latter
       form nano will check the availabilty of the function in the given menu at startup  time  (and  report  an
       error  if it does not exist there), whereas for the first form nano will check at execution time that the
       function exists but not whether it makes any sense in the current menu.  The user has to take care that a
       function  name between braces (or any sequence of them) is appropriate.  Strange behavior can result when
       it is not.

       The format of key should be one of:

          ^X     where X is a Latin letter, or one of several ASCII characters (@, ], \,  ^,  _),  or  the  word
                 "Space".  Example: ^C.

          M-X    where X is any ASCII character except [, or the word "Space".  Example: M-8.

          Sh-M-X where  X  is a Latin letter.  Example: Sh-M-U.  By default, each Meta+letter keystroke does the
                 same as the corresponding Shift+Meta+letter.  But when any Shift+Meta bind is made,  that  will
                 no longer be the case, for all letters.

          FN     where  N is a numeric value from 1 to 24.  Example: F10.  (Often, F13 to F24 can be typed as F1
                 to F12 with Shift.)

          Ins or Del.

       Rebinding ^M (Enter) or ^I (Tab) is probably not a good  idea.   Rebinding  ^[  (Esc)  is  not  possible,
       because  its  keycode  is the starter byte of Meta keystrokes and escape sequences.  Rebinding any of the
       dedicated cursor-moving keys (the arrows, Home, End, PageUp and  PageDown)  is  not  possible.   On  some
       terminals  it's not possible to rebind ^H (unless --raw is used) because its keycode is identical to that
       of the Backspace key.

       Valid function names to be bound are:

          help
            Invokes the help viewer.

          cancel
            Cancels the current command.

          exit
            Exits from the program (or from the help viewer or file browser).

          writeout
            Writes the current buffer to disk, asking for a name.

          savefile
            Writes the current file to disk without prompting.

          insert
            Inserts a file into the current buffer (at the current cursor position), or into a new  buffer  when
            option multibuffer is set.

          whereis
            Starts  a forward search for text in the current buffer -- or for filenames matching a string in the
            current list in the file browser.

          wherewas
            Starts a backward search for text in the current buffer -- or for filenames matching a string in the
            current list in the file browser.

          findprevious
            Searches the next occurrence in the backward direction.

          findnext
            Searches the next occurrence in the forward direction.

          replace
            Interactively replaces text within the current buffer.

          cut
            Cuts and stores the current line (or the marked region).

          copy
            Copies the current line (or the marked region) without deleting it.

          paste
            Pastes the currently stored text into the current buffer at the current cursor position.

          zap
            Throws  away  the  current  line  (or  the  marked  region).   (This function is bound by default to
            <Meta+Delete>.)

          chopwordleft
            Deletes from the cursor position to the beginning of the preceding word.  (This function is bound by
            default  to  <Shift+Ctrl+Delete>.   If  your terminal produces ^H for <Ctrl+Backspace>, you can make
            <Ctrl+Backspace> delete the word to the left of the cursor by rebinding ^H to this function.)

          chopwordright
            Deletes from the cursor position to the beginning of the next word.   (This  function  is  bound  by
            default to <Ctrl+Delete>.)

          cutrestoffile
            Cuts all text from the cursor position till the end of the buffer.

          mark
            Sets  the  mark  at  the  current position, to start selecting text.  Or, when it is set, unsets the
            mark.

          location
            Reports the current position of the cursor in the buffer: the line, column, and character positions.

          wordcount
            Counts and reports on the status bar the number of lines,  words,  and  characters  in  the  current
            buffer (or in the marked region).

          execute
            Prompts for a program to execute.  The program's output will be inserted into the current buffer (or
            into a new buffer when M-F is toggled).

          speller
            Invokes a spell-checking program, either the default hunspell(1) or GNU spell(1), or the one defined
            by --speller or set speller.

          formatter
            Invokes a full-buffer-processing program (if the active syntax defines one).  (The current buffer is
            written out to a temporary file, the program is run on it, and then the temporary file is read  back
            in, replacing the contents of the buffer.)

          linter
            Invokes  a  syntax-checking  program  (if  the active syntax defines one).  If this program produces
            lines of the form "filename:linenum:charnum: some message", then the  cursor  will  be  put  at  the
            indicated  position  in  the mentioned file while showing "some message" on the status bar.  You can
            move from message to message with <PgUp> and <PgDn>, and leave linting mode with ^C or <Enter>.

          justify
            Justifies the current paragraph (or the marked region).  A paragraph is a group of contiguous  lines
            that,  apart  from  possibly  the  first  line,  all  have the same indentation.  The beginning of a
            paragraph is detected by either this lone line with a differing indentation or by a preceding  blank
            line.

          fulljustify
            Justifies the entire current buffer (or the marked region).

          indent
            Indents (shifts to the right) the current line or the marked lines.

          unindent
            Unindents (shifts to the left) the current line or the marked lines.

          comment
            Comments  or  uncomments  the current line or the marked lines, using the comment style specified in
            the active syntax.

          complete
            Completes (when possible) the fragment before the cursor to a  full  word  found  elsewhere  in  the
            current buffer.

          left
            Goes left one position (in the editor or browser).

          right
            Goes right one position (in the editor or browser).

          up
            Goes one line up (in the editor or browser).

          down
            Goes one line down (in the editor or browser).

          scrollup
            Scrolls  the viewport up one row (meaning that the text slides down) while keeping the cursor in the
            same text position, if possible.  (This function is bound by default to <Alt+Up>.  If <Alt+Up>  does
            nothing on your Linux console, see the FAQ: ⟨https://nano-editor.org/dist/latest/faq.html#4.1⟩.)

          scrolldown
            Scrolls  the viewport down one row (meaning that the text slides up) while keeping the cursor in the
            same text position, if possible.  (This function is bound by default to <Alt+Down>.)

          center
            Scrolls the line with the cursor to the middle of the screen.

          prevword
            Moves the cursor to the beginning of the previous word.

          nextword
            Moves the cursor to the beginning of the next word.

          home
            Moves the cursor to the beginning of the current line.

          end
            Moves the cursor to the end of the current line.

          beginpara
            Moves the cursor to the beginning of the current paragraph.

          endpara
            Moves the cursor to the end of the current paragraph.

          prevblock
            Moves the cursor to the beginning of the current or preceding block of text.  (Blocks are  separated
            by one or more blank lines.)

          nextblock
            Moves the cursor to the beginning of the next block of text.

          pageup
            Goes up one screenful.

          pagedown
            Goes down one screenful.

          firstline
            Goes to the first line of the file.

          lastline
            Goes to the last line of the file.

          gotoline
            Goes  to a specific line (and column if specified).  Negative numbers count from the end of the file
            (and end of the line).

          findbracket
            Moves the cursor to the bracket (or brace or parenthesis, etc.) that matches (pairs)  with  the  one
            under the cursor.  See set matchbrackets.

          anchor
            Places  an  anchor  at  the current line, or removes it when already present.  (An anchor is visible
            when line numbers are activated.)

          prevanchor
            Goes to the first anchor before the current line.

          nextanchor
            Goes to the first anchor after the current line.

          prevbuf
            Switches to editing/viewing the previous buffer when multiple buffers are open.

          nextbuf
            Switches to editing/viewing the next buffer when multiple buffers are open.

          verbatim
            Inserts the next keystroke verbatim into the file, or begins Unicode input when a hexadecimal  digit
            is typed.

          tab
            Inserts a tab at the current cursor location.

          enter
            Inserts a new line below the current one.

          delete
            Deletes the character under the cursor.

          backspace
            Deletes the character before the cursor.

          recordmacro
            Starts the recording of keystrokes -- the keystrokes are stored as a macro.  When already recording,
            the recording is stopped.

          runmacro
            Replays the keystrokes of the last recorded macro.

          undo
            Undoes the last performed text action (add text, delete text, etc).

          redo
            Redoes the last undone action (i.e., it undoes an undo).

          refresh
            Refreshes the screen.

          suspend
            Suspends the editor and returns control to the shell (until you tell the process to resume execution
            with fg).

          casesens
            Toggles whether searching/replacing ignores or respects the case of the given characters.

          regexp
            Toggles whether searching/replacing uses literal strings or regular expressions.

          backwards
            Toggles whether searching/replacing goes forward or backward.

          older
            Retrieves the previous (earlier) entry at a prompt.

          newer
            Retrieves the next (later) entry at a prompt.

          flipreplace
            Toggles between searching for something and replacing something.

          flipgoto
            Toggles between searching for text and targeting a line number.

          flipexecute
            Toggles between inserting a file and executing a command.

          flippipe
            When  executing  a  command,  toggles  whether the current buffer (or marked region) is piped to the
            command.

          flipnewbuffer
            Toggles between inserting into the current buffer and into a new empty buffer.

          flipconvert
            When reading in a file, toggles between converting  and  not  converting  it  from  DOS/Mac  format.
            Converting is the default.

          dosformat
            When writing a file, switches to writing a DOS format (CR/LF).

          macformat
            When writing a file, switches to writing a Mac format.

          append
            When writing a file, appends to the end instead of overwriting.

          prepend
            When writing a file, 'prepends' (writes at the beginning) instead of overwriting.

          backup
            When writing a file, creates a backup of the current file.

          discardbuffer
            When  about  to write a file, discard the current buffer without saving.  (This function is bound by
            default only when option --saveonexit is in effect.)

          browser
            Starts the file browser (in the Read File and Write Out menus), allowing to select  a  file  from  a
            list.

          gotodir
            Goes to a directory to be specified, allowing to browse anywhere in the filesystem.

          firstfile
            Goes to the first file in the list when using the file browser.

          lastfile
            Goes to the last file in the list when using the file browser.

          nohelp
            Toggles the presence of the two-line list of key bindings at the bottom of the screen.  (This toggle
            is special: it is available in all menus except the help viewer and the linter.  All further toggles
            are available in the main menu only.)

          zero
            Toggles the presence of title bar and status bar.

          constantshow
            Toggles the constant display of the current line, column, and character positions.

          softwrap
            Toggles the displaying of overlong lines on multiple screen lines.

          linenumbers
            Toggles the display of line numbers in front of the text.

          whitespacedisplay
            Toggles the showing of whitespace.

          nosyntax
            Toggles syntax highlighting.

          smarthome
            Toggles the smartness of the Home key.

          autoindent
            Toggles  whether  a  newly  created  line  will contain the same amount of leading whitespace as the
            preceding line -- or as the next line if the preceding line is the beginning of a paragraph.

          cutfromcursor
            Toggles whether cutting text will cut the whole line or just from the current cursor position to the
            end of the line.

          breaklonglines
            Toggles  whether  long lines will be hard-wrapped to the next line.  (The old name of this function,
            'nowrap', is deprecated.)

          tabstospaces
            Toggles whether typed tabs will be converted to spaces.

          mouse
            Toggles mouse support.

       Valid menu sections are:

          main
            The main editor window where text is entered and edited.

          help
            The help-viewer menu.

          search
            The search menu (AKA whereis).

          replace
            The 'search to replace' menu.

          replacewith
            The 'replace with' menu, which comes up after 'search to replace'.

          yesno
            The 'yesno' menu, where the Yes/No/All/Cancel question is asked.

          gotoline
            The 'goto line (and column)' menu.

          writeout
            The 'write file' menu.

          insert
            The 'insert file' menu.

          browser
            The 'file browser' menu, for selecting a file to be opened or inserted or written to.

          whereisfile
            The 'search for a file' menu in the file browser.

          gotodir
            The 'go to directory' menu in the file browser.

          execute
            The menu for inserting the output from an external command, or for  filtering  the  buffer  (or  the
            marked region) through an external command, or for executing one of several tools.

          spell
            The menu of the integrated spell checker where the user can edit a misspelled word.

          linter
            The linter menu, which allows jumping through the linting messages.

          all
            A special name that encompasses all menus.  For bind it means all menus where the specified function
            exists; for unbind it means all menus where the specified key exists.

FILES

       /etc/nanorc
              System-wide configuration file.

       ~/.nanorc or $XDG_CONFIG_HOME/nano/nanorc or ~/.config/nano/nanorc
              Per-user configuration file.

       /usr/share/nano/*
              Syntax definitions for the syntax coloring of common file types (and for less common file types in
              the extra/ subdirectory).

SEE ALSO

       nano(1)

       https://nano-editor.org/cheatsheet.html
              An overview of the default key bindings.