Thank you for your quick responses.
This was to change the case font of lettering in a post thread in a browser forum (yeh - FaceBook lol)
When I tried shift+command+U it opens "Utilities".
What I was able to do was "copy" the text from the browser Forum into a "New Message" in "Mail". From there I could access the "Text Transformations" > "Make Upper Case" option from the "Edit" drop down menu in the upper toolbar. Worked like a charm.
Hit "Edit" in Forum thead; "Delete" thread response and "Paste" in edited response.
I don't use "Text Edit" very often. I do use "Mail" and "New Message" as a word processor app to edit material.