I often need to change the case of a series of words, because I quote from PDFs of old magazines and newspapers that had a tendency to USE A LOT OF ALL CAPS
I use the Edit menu command “Transform”, which has options such as all caps, lowercase, capitalise, etc., which is very useful.
But it would be even more useful, imho, if the shortcut worked as a toggle (as it does in Ms Word), i.e. it cycles through the different transformations. So on the first press you get uppercase, then lowercase, capitalise, etc., as you keep pressing the same shortcut key combo.
Saves having three of four different shortcut key combos to remember and would make the feature even more useful.