Keytips provide a way to access the application menu, the Quick Access toolbar, and the ribbon using the keyboard.
To display keytips, press Alt.
You can use keytips to navigate through the ribbon. Type the keytip for a ribbon tab to bring that tab into focus and to display the keytips for its buttons and controls. In the example above, type N to display the Annotate tab.
If a ribbon tab has an expanded panel containing additional tools, type its keytip to display the panel and see keytips for those tools.
To hide keytips, press ESC.