Microsoft Word 2016 and 2013 users can find the help button (?) at the top right hand corner of the application. and keyboard shortcut for accessing help is F1
Word 2013 users can search for online help or from the local computer.
The option to choose Online or Offline help can be done by clicking down the arrow available below Word Help.
For example, if you want to find out the steps to insert comment in word document then type the text in search text bar and press Enter button.
Now selecting the search result would display detailed information.
The help window, provides users with the option to
use small or large text, print the help content and navigation to home screen, Go back or forward.