Reformat each paragraph in the FILE(s), writing to standard output. If no FILE or if FILE is `-', read standard input.

Mandatory arguments to long options are mandatory for short options too.

-c, --crown-margin

preserve indentation of first two lines

-p, --prefix=STRING

reformat only lines beginning with STRING, reattaching the prefix to reformatted lines

-s, --split-only

split long lines, but do not refill

-t, --tagged-paragraph

indentation of first line different from second

-u, --uniform-spacing

one space between words, two after sentences

-w, --width=WIDTH

maximum line width (default of 75 columns)

--help

display this help and exit

--version

output version information and exit

With no FILE, or when FILE is -, read standard input.

info fmt

should give you access to the complete manual.