Here is the listing you’ll get from help in Raspbian:
$ nano --help
Usage: nano [OPTIONS] [[+LINE,COLUMN] FILE]...
| Option | GNU long option | Meaning |
|---|---|---|
| -h, -? | –help | Show this message |
| +LINE,COLUMN | Start at line LINE, column COLUMN | |
| -A | –smarthome | Enable smart home key |
| -B | –backup | Save backups of existing files |
| -C \<dir> | –backupdir=\<dir> | Directory for saving unique backup files |
| -D | –boldtext | Use bold instead of reverse video text |
| -E | –tabstospaces | Convert typed tabs to spaces |
| -F | –multibuffer | Enable multiple file buffers |
| -H | –historylog | Log & read search/replace string history |
| -I | –ignorercfiles | Don’t look at nanorc files |
| -K | –rebindkeypad | Fix numeric keypad key confusion problem |
| -L | –nonewlines | Don’t add newlines to the ends of files |
| -N | –noconvert | Don’t convert files from DOS/Mac format |
| -O | –morespace | Use one more line for editing |
| -Q \<str> | –quotestr=\<str> | Quoting string |
| -R | –restricted | Restricted mode |
| -S | –smooth | Scroll by line instead of half-screen |
| -T <#cols> | –tabsize=<#cols> | Set width of a tab to #cols columns |
| -U | –quickblank | Do quick statusbar blanking |
| -V | –version | Print version information and exit |
| -W | –wordbounds | Detect word boundaries more accurately |
| -Y \<str> | –syntax=\<str> | Syntax definition to use for coloring |
| -c | –const | Constantly show cursor position |
| -d | –rebinddelete | Fix Backspace/Delete confusion problem |
| -i | –autoindent | Automatically indent new lines |
| -k | –cut | Cut from cursor to end of line |
| -l | –nofollow | Don’t follow symbolic links, overwrite |
| -m | –mouse | Enable the use of the mouse |
| -o \<dir> | –operatingdir=\<dir> | Set operating directory |
| -p | –preserve | Preserve XON (^Q) and XOFF (^S) keys |
| -q | –quiet | Silently ignore startup issues like rc file errors |
| -r <#cols> | –fill=<#cols> | Set wrapping point at column #cols |
| -s \<prog> | –speller=\<prog> | Enable alternate speller |
| -t | –tempfile | Auto save on exit, don’t prompt |
| -u | –undo | Allow generic undo [EXPERIMENTAL] |
| -v | –view | View mode (read-only) |
| -w | –nowrap | Don’t wrap long lines |
| -x | –nohelp | Don’t show the two help lines |
| -z | –suspend | Enable suspension |
| -$ | –softwrap | Enable soft line wrapping |
| -a, -b, -e, -f, -g, -j | (ignored, for Pico compatibility) |