Like so many things in InDesign this seems like basic functionality missing from the app. Please take it out of the back log and add this simple feature.

@RY that’s what I do already re keyboard shortcuts but you still have to go into/select each text item when you do this, where a style would be faster to apply to hundreds at once.

Stop waiting on them and create your own keyboard shortcuts for this—it's what I've done.
https://helpx.adobe.com/indesign/using/customize-menus-keyboard-shortcuts.html

I do not understand why there is a shortcut on the menu bar to ALL CAPS but not Title Case or Sentence case! We need that AND the ability to force it with paragraph or character styles!!

I need this feature!!

Please add Title Case, Sentence Case and Lowercase to both Paragraph Styles and Character styles. I've had to to this manually so many times!

Why does the case option still dont have lowercase while the file menu has. Also what is "normal", is that dont change??? Make the options global and the same, streamline it.

Please Add Lowercase To The Character Styles! https://rankaroo.com/

For those who are requesting this feature...
While it's not possible directly by InDesign, there is a script solution for this: https://corullon.com.br/scripts/product/change-case/

YES PLEEEEEEAAAAASSSSEEE.

and a big YES please from me. The author insists on loads of capitals everywhere, I want to find the heading style and change All Caps to Title Caps, it would save sooooo much time!

I agree that this would be a great feature to have within InDesign's paragraph or character styles.
I've been having to use lowercase much more often for titles, and it would save a step or two.

I neeeed this! Pleeeeeeease please please fix this Adobe <3

@Raphaël:

Using the OpenType All Small Caps is of course the correct way to go; but sometimes, you’re forced by circumstances outside your control to use fonts that do not support this feature and rely on special small-caps fonts, in which case text needs to be all-lowercase to give the same result.

Adding my vote, with the note that the reason for not being able to use the Change Case command is that I need the style for TOC reference text where the original text should not be modified.

Could I also point out that when you throw small caps into the mix, it is possibly better not to merge setting the desired character case (as in Change Case command) and setting the upper/lower case appearance (small caps etc).

Still waiting for this feature.

This would also be helpful for data merging addresses where the customer wants all lower case addresses.

Please add this feature!

How is this not an option yet???

Please add all the case options in paragraph styles.