The ability to use Shift+F3 to toggle between UPPER CASE, lower case, Initial Caps.
This is used in other programs such as Outlook and Word. It would be a useful addition to Revit
@Anonymous, in Revit is possible to toggle between lower case and UPPER CASE (but not Initial Caps) pressing the keys Ctrl+Shift+A when hightlighting a text or using the All Caps tool on the Font Panel from Text Edit contextual Tab.