The Magic of F4

In Microsoft Office, the F4 key can be used to repeat the previous action on another selected item. The computer remembers the last action you carry out so, for example, if you’ve just highlighted a word in bold and want to do the same to another one straight afterwards, simply click somewhere in the next word and press F4 to embolden it. This also works when formatting cells in Excel,
text or bullets in Word, or drawing objects anywhere across the Office workspace.