Changing Character Case of Title in Slide Master? Not possible to get UPPER CASE.

In Impress, I try to change the casing of the slide titles to UPPERCASE.

When I select the text (and not the box) of the title, i change to UPPERCASE, via Format> Change Case. In the slide master, indeed I get uppercase characters. NOT in the real slides, unfortunately.

Can we get this feature please?

Amsterdam, NL