I just raised issue 94584 about adding the options "Sentence case" and "Title
Case" to the change case feature.  In addition to this, it would be nice to be
abble to associate a particular kind of case with a certain style - for example
your Document Body style would want to be Sentence case, while your Heading 1
style might want to be Title Case.

Basically, what I envisage is this: the auto spell check already corrects case
to Sentence case as you type.  I'd like to be able to set the case when I'm
defining a style, eg to CAPITALS or Title Case, and then when I'm typing in that
style the autocorrect would automatically correct my case to whatever I've
specified in the style.

As far as I know, this feature isn't included in MS Word, although I don't know
why.  Seems like a natural thing to define in a style - Headers obviously want
to be Title Case, etc.