The interface of Microsoft Word is optimized for your mouse by default. However, those with touch-enabled screens may find it challenging to select commands using the more compact mouse mode. Enabling touch mode increases the size of your Ribbon, buttons, and menu commands so you can tap them better with your finger.
Enabling Touch Mode
Enabling touch mode requires only a few steps. First, click the small arrow at the right of the Quick Access bar.
This opens a menu where you can add and remove commands to the Quick Access bar. It also features a “Touch/Mouse Mode” option, which you should enable now.
After you add that option to the Quick Access toolbar, a new icon appears that you can use to open a menu where you can move between Mouse and Touch modes.
Go ahead and select the “Touch” option. You’ll notice immediately that the Ribbon and Quick Access bar not only increase in size, but there’s more space between each command, too.
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Source : How to Enable (or Disable) and Use Touch Mode in Word
