These letters and numbers guide you through keystroke sequences that allow you do do virtually anything with your keyboard - instead of clicking with your mouse - as I’ll explain below. If you hit the Alt key you’ll see the Ribbon and the QAT ( Quick Access Toolbar – just below the Ribbon) light up with letters or numbers. If you’ve ever seen someone use both hands all day long on the keyboard in Excel, chances are they were using Alt shortcuts or “keyboard accelerators.” So what are they and how do they work?