You don’t need to be afraid of making a mistake in Word, because you can use the Undo feature to erase your actions. The undo, redo, and repeat commands are very useful for working with text in a document.
Redo is the opposite of undo: it redoes an action you have undone. For example, if you decide that you do, after all, want to delete an item that you have just brought back with undo, you can redo the action.
The Redo button is only available right after you’ve undone something. When Redo isn’t available, the button is replaced by the Repeat button.
Click the Redo button.
Press Ctrl + Y.
The last action you undid is redone.
Click the Redo button multiple times to redo multiple actions.
Repeat is different from redo; repeat applies the last command to any selected text. For example, rather than applying bold formatting to multiple instances of text by clicking the Bold button repeatedly, you can repeat the bold command with the Repeat button or keystroke.