So, to make your text all CAPS you simply:
Click on your text element
Go under "Edit" where you have three options (from left to right):
" - " - button will make your text go back to how your text looked when you initially wrote it e.g. Inserts a Sub-headline
" TT " - button will make all your text upper case e.g. INSERT A SUB-HEADLINE
" tt " - button will make all your text lower case e.g. insert a sub-headline
.... and you did it now take a few seconds to enjoy your work 🎉
👆 The text box will not adjust to the text changing size, this will have to be done manually
Happy letter sizing 😄