The programs in the Office 2016 suite — Word 2016, Excel 2016, PowerPoint 2016, OneNote 2016, Outlook 2016, Access 2016, and Publisher 2016 — have these indispensable commands in common:
Undo: Don't despair if you give a command and then realize that you shouldn't have done that. You can undo your mistake by clicking the Undo button on the Quick Access toolbar (or pressing Ctrl+Z). The Undo command reverses your last action, whatever it happened to be. Keep clicking Undo to reverse several actions. You can also open the Undo drop-down list and undo many commands.
Repeat: Click the Repeat button (or press F4 or Ctrl+Y) on the Quick Access toolbar to repeat your latest action, whatever it was, and spare yourself from having to do it a second time. You can move to another place in your file before giving the command.
Recent files list: Find out whether the file you want to open is on the Recent list, and if it's there, click to open it without having to rummage through Open dialog boxes. On the File tab, click Open and look for the Recent list in the Open window.
Zoom: Use the Zoom controls in the lower-right corner of the screen to prevent eyestrain and make your work more efficient. Drag the Zoom slider to shrink or enlarge what's on-screen. Click the Zoom In or Zoom Out button to zoom in or out by 10-percent increments. If your mouse has a wheel, hold down the Ctrl key and spin the mouse wheel to zoom.