Microsoft Excel 2013 gives you access to hot key sequences that keyboard enthusiasts can use to greatly speed up the process of selecting program commands. The first thing to know is that you activate all the Excel 2013 hot keys by pressing the Alt key before you type the various sequences of mnemonic (or not-so-mnemonic) letters.
The great thing about the Ribbon interface is that as soon as you press the Alt key, Excel displays the letter choices on the various tabs and command buttons on the Ribbon to help you figure out what key to press next. Of course, to really save time, you’re better off remembering common hot key sequences and then typing the entire sequence while holding down the Alt key.