This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
Mathematica Menu Item

Format Word Wrapping

Word Wrapping
opens a submenu of word wrapping styles
Don't Word Wrapturn word wrapping off
Wrap at Paper Widthwrap lines to width of paper
Wrap at Window Widthwrap lines to width of window