TextJustification is an option for Cell which specifies how much lines of text can be stretched in order to make them be the same length.
TextJustification->0 does no stretching, and leads to ragged text boundaries.
TextJustification->1 does full justification, and forces all complete lines to be the same length.
No stretching is done on lines that end with explicit Return characters.
With settings for TextJustification between 0 and 1, partial justification is done.
With TextJustification->s, Mathematica will take the amount by which each broken line is shorter than PageWidth, and then insert within the line a total amount of space equal to s times this.
If TextJustification is not 0, the standard Mathematica front end will dynamically adjust the lengths of lines as you enter text.
See Section 2.11.10.
See also: TextAlignment, Hyphenation, PageWidth, AutoSpacing, ButtonExpandable.
New in Version 3.