20.6.2 Explicit Fill Commands
Fill current paragraph (`fill-paragraph').
Fill each paragraph in the region (`fill-region').
Set the fill column (`set-fill-column').
Fill the region, considering it as one paragraph.
Center a line.
To refill a paragraph, use the command `Meta-q' (`fill-paragraph').
It causes the paragraph containing point, or the one after point if
point is between paragraphs, to be refilled. All line breaks are
removed, and new ones are inserted where necessary. `M-q' can be
undone with `C-_'. Note: Undo.
To refill many paragraphs, use `M-g' (`fill-region'), which divides
the region into paragraphs and fills each of them.
`Meta-q' and `Meta-g' use the same criteria as `Meta-h' for finding
paragraph boundaries (Note: Paragraphs). For more control, you can
use `M-x fill-region-as-paragraph', which refills everything between
point and mark. This command recognizes only blank lines as paragraph
A numeric argument to `M-g' or `M-q' causes it to "justify" the text
as well as filling it. Extra spaces are inserted to make the right
margin line up exactly at the fill column. To remove the extra spaces,
use `M-q' or `M-g' with no argument.
The variable `auto-fill-inhibit-regexp' takes as a value a regexp to
match lines that should not be auto-filled.
The command `Meta-s' (`center-line') centers the current line within
the current fill column. With an argument, it centers several lines
individually and moves past them.
The maximum line width for filling is in the variable `fill-column'.
Altering the value of `fill-column' makes it local to the current
buffer; until then, the default value--initially 70--is in effect.
The easiest way to set `fill-column' is to use the command `C-x f'
(`set-fill-column'). With no argument, it sets `fill-column' to the
current horizontal position of point. With a numeric argument, it uses
that number as the new fill column.
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