Select the text for which you want to change the case.
Go to Home > Change case .
Do one of the following:
To capitalize the first letter of a sentence and leave all other letters as lowercase, click Sentence case.
To exclude capital letters from your text, click lowercase.
To capitalize all of the letters, click UPPERCASE.
To capitalize the first letter of each word and leave the other letters lowercase, click Capitalize Each Word.
To shift between two case views (for example, to shift between Capitalize Each Word and the opposite, cAPITALIZE eACH wORD), click tOGGLE cASE.