Word autocorrects a lot of mistakes for you, and if it's not autocorrected, you'll see colored underlines appear under words to check for spelling, grammar, and clarity.

  • To check each item that Word finds, right-click the underlined text and learn more about the issue. Accept the change that Word suggests, or ignore it.

  • To check the whole document, moving to each issue Word finds, press F7.


Source: Microsoft