The return key indicates the end of a paragraph. A new paragraph starts with
a new sentence, so the first letter of the word is capitalized. Two ways to
turn it off:
W'07: Office button, Word options, Proofing, Autocorrect options, uncheck
Capitalize first letter of sentences.
Previous: Tools, Autocorrect options.
Better yet: Do NOT press return at the end of a line unless you mean to end
the current paragraph. Word is not a typewriter.
-TedMi