Here’s something you may not have known about Office 2013.
In the Quickstart menu at the very top of the screen you will see a down arrow that allows you to customize this menu. On that menu you’ll find an option Touch/Mouse mode.
If you add that item to the Quickstart menu you’ll now see a new button appear that looks like a pointing finger. Pressing that reveals the two menu options shown above.
If you select the Touch option the Office interface, including the Ribbon Menu is optimized for touch (i.e. the spacing between the buttons increases).
If you then select Mouse the interface will return to the original spacing.
Thus, you can easily toggle between touch and mouse depending on how you are using the device. Really handy for hybrid devices like the Microsoft Surface Pro and is available in all Office 2013 applications.