Apps and features209Using the external display and smartphone simultaneouslyWhile using Samsung DeX, you can use separate apps on the external display and yoursmartphone simultaneously.For example, while watching a video on the connected TV or monitor, you can create a noteon your smartphone.On the connected TV or monitor, launch an app to run on the Samsung DeX screen. Then,launch another app on your smartphone.Locking the Samsung DeX screenIf you want to lock the external display and your smartphone’s screen while using SamsungDeX, select on the quick access toolbar.While using Samsung DeX, you cannot lock the external display and yoursmartphone’s screen by pressing the Power key.Enjoying games vividly on a large screenPlay your smartphone’s games on a large screen. On the connected TV or monitor, launch theGame Launcher app.Ending Samsung DeXWhen you disconnect your smartphone from the connected TV or monitor, Samsung DeX willend.Disconnect your smartphone from the HDMI adaptor.