Change the Case of Selected Text in Word

When we talk about case, we are referring to uppercase and lowercase letters (capitals and small letters). Case is used to show emphasis, create a style and/or improve readability.
By default, letters are set to lowercase. Capitals are created by holding down the Shift key and pressing the letter key. Or by using the Caps Lock key for a series of capital letters.
The change case feature in Word gives options for case settings; Sentence case, lowercase, UPPERCASE, Capitalize Each Word or tOGGLE cASE.
Select the text and press Alt + H, then 7 to access this list of options.
Or select the text and press Shift + F3 to cycle between all CAPITALS, all lowercase or Capitalise Each Word.