The appearance of type on the page depends
on a complex interaction of processes called composition.
Using the word spacing, letterspacing, glyph spacing, and hyphenation
options you’ve selected, Adobe applications evaluate possible line
breaks and choose the one that best supports the specified parameters.
You can choose between two composition methods: the Adobe Every‑line Composer
and the Adobe Single‑line Composer. Both methods evaluate possible breaks
and choose the one that best supports the hyphenation and justification options
you’ve specified for a given paragraph. The composition method affects only
the selected paragraph or paragraphs, so you can easily set different
composition methods for different paragraphs.