Samsung SM-T638U User Manual page 61

Apps and features
Locking the Samsung DeX screen
If you want to lock the Samsung DeX screen and your tablet's screen while using Samsung
→ Lock DeX.
DeX, select
While using Samsung DeX, you cannot lock the Samsung DeX screen and your tablet's
screen by pressing the Side key.
Ending Samsung DeX
Use the following methods to end Samsung DeX.
• On your tablet, open the notification panel, swipe downwards, and then tap
deactivate it.
• Tap
at the bottom of the left corner and tap Exit DeX.
• Disconnect your tablet from the HDMI adaptor.
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(DeX) to