set-justification-full

set-justification-full is an interactive compiled Lisp function in `fill.el'.

It is bound to <C-down-mouse-2> <ju> b, <menu-bar> <edit> <props> <ju> b.

(set-justification-full B E)

Make paragraphs in the region fully justified.
This makes lines flush on both margins by inserting spaces between words.
If the mark is not active, this applies to the current paragraph.