to capitalize the first letter of each sentence.
Note: The
Sentence Case command assumes that the period (.), exclamation point (!),
and question mark (?) characters mark the ends of sentences. Applying
Sentence Case may cause unexpected case changes when these characters
are used in other ways, as in abbreviations, filenames, or URLs.
In addition, proper names may become lowercase.

If
you’re using an OpenType font, you may want to take advantage of
All Caps formatting to create more elegant type.