If you install the excellent ASAP Utilities Excel addin (free for personal use)...

http://www.asap-utilities.com/download-asap-utilities.php

this has in built UPPER CASE and lower case options (as well as a zillion others) which you can assign shortcut keys to (see their website for more info)

If you install the excellent ASAP Utilities Excel addin (free for personal use)...

http://www.asap-utilities.com/download-asap-utilities.php

this has built-in UPPER CASE and lower case options (as well as a zillion others) which you can assign shortcut keys to (see their website for more info)