(emacs)Auto Fill

Next: Fill Commands Up: Filling

Auto Fill Mode

   "Auto Fill" mode is a minor mode in which lines are broken
automatically when they become too wide.  Breaking happens only when
you type a SPC or RET.

`M-x auto-fill-mode'
     Enable or disable Auto Fill mode.

     In Auto Fill mode, break lines when appropriate.

   `M-x auto-fill-mode' turns Auto Fill mode on if it was off, or off if
it was on.  With a positive numeric argument it always turns Auto Fill
mode on, and with a negative argument always turns it off.  You can see
when Auto Fill mode is in effect by the presence of the word `Fill' in
the mode line, inside the parentheses.  Auto Fill mode is a minor mode,
turned on or off for each buffer individually.  Note: Minor Modes.

   In Auto Fill mode, lines are broken automatically at spaces when
they get longer than the desired width.  Line breaking and
rearrangement takes place only when you type SPC or RET.  If you wish
to insert a space or newline without permitting line-breaking, type
`C-q SPC' or `C-q LFD' (recall that a newline is really a linefeed).
Also, `C-o' inserts a newline without line breaking.

   Auto Fill mode works well with Lisp mode, because when it makes a new
line in Lisp mode it indents that line with TAB.  If a line ending in a
comment gets too long, the text of the comment is split into two
comment lines.  Optionally new comment delimiters are inserted at the
end of the first line and the beginning of the second so that each line
is a separate comment; the variable `comment-multi-line' controls the
choice (Note: Comments.).

   Auto Fill mode does not refill entire paragraphs.  It can break
lines but cannot merge lines.  So editing in the middle of a paragraph
can result in a paragraph that is not correctly filled.  The easiest
way to make the paragraph properly filled again is usually with the
explicit fill commands.  Note: Fill Commands.

   Many users like Auto Fill mode and want to use it in all text files.
The section on init files says how to arrange this permanently for
yourself.  Note: Init File.

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