Change text case
You can change the case of selected text in a document by clicking the Change Case button on the ribbon. For example, you can change the selected text from lowercase to UPPERCASE.
Select the text for which you want to change the case.
On the Home tab, under Font group, click Change Case .
Choose an option from the pop-up menu, which includes Sentence case, lowercase, UPPERCASE, Title Case, and tOGGLE cASE.