increase-right-margin

increase-right-margin is an interactive compiled Lisp function in `indent.el'.

It is bound to <C-down-mouse-2> <in> <increase-right-margin>, <menu-bar> <edit> <props> <in> <increase-right-margin>.

(increase-right-margin FROM TO INC)

Increase the right-margin of the region.
With no prefix argument, increase the right margin by `standard-indent'.
A prefix arg (optional third arg INC noninteractively) specifies the amount
to change the margin by, in characters. A negative argument decreases
the right margin width.
If `auto-fill-mode' is active, re-fill the region to fit the new margin.