F7: Spell Check (Microsoft Office)
In most Microsoft Office apps (including Word, Excel, PowerPoint and Outlook), tap F7 to begin the spellcheck process.
In the spellecheck dialog box, don’t forget to use Alt plus an underlined letter to hit the button! Using Alt+A to Add a correct word (such as your last name) to your custom dictionary is smart because it saves time in two ways — now, by saving you from having to use your mouse to hit the button, and later, by preventing this correctly spelled word from ever wasting your time again.