Dell UP3214Q Monitor - Manual (Page 66)

66  Setting Up Your Monitor Display
(c) For Windows® 8/Windows® 8.1
Connect the external monitor(s) to your laptop or desktop using a video
cable (DP, HDMI etc.) and follow any of the below setup method.
Method 1: Using keyboard shortcut “Win+P”
1. Press the Windows logo key + P on your keyboard.
2. While holding down the Windows logo key, press P to toggle between
the display selections.
Method 2: Using the “Screen Resolution” menu
1. From the Start screen, select Desktop tile to switch to the Classic
Windows desktop.