Word 2016 offers a couple of commands that enable you to fix mistakes and restore your documents — Redo and Repeat. If you undo something and — whoops! — you didn't mean to, use the Redo command to set things back to the way they were.
For example, you may type some text and then use Undo to "untype" the text. You can use the Redo command to restore the typing. You have two choices:
Click the Redo command button on the Quick Access Toolbar.
The Redo command does exactly the opposite of whatever the Undo command does. So, if you type text, Undo untypes the text and Redo recovers the text. If you use Undo to recover deleted text, Redo deletes the text again.
When the Redo command has nothing left to redo, it changes functions and becomes the Repeat command. On the Quick Access toolbar, the command changes as shown here. The Repeat command's duty is to repeat the last thing you did in Word, whether it's typing text, applying a format, or doing a variety of other things.
Lamentably, you can't use the Repeat command to ease your typing chores. That's because it repeats only the last single character you typed.
The keyboard shortcut for the Repeat command is Ctrl+Y, the same as the Redo command.