Change case with Shift-F3

Sometimes older imported references come in ALL CAPS, and sometimes in First Letter Capitalization when they should be in all lower case. Sure, the way in which they should appear in the reference list can be specificed through the Title Capitalization field in the style, but often the best choice is to ‘Leave titles as entered’. In Word one can cycle between all caps, first letter caps and all lower case by pressing Shift-F3. This functionality would b really useful for Endnote fields as well.