Samsung Galaxy Tab S4 User Manual page 146

Apps and features
Starting Samsung DeX
You can use Samsung DeX in two ways, on tablet screen and external display.
Starting Samsung DeX on tablet screen
Use your tablet like a computer by connecting the Keyboard Cover.
To switch to Samsung DeX directly when connecting the Keyboard Cover, launch the
Settings app, tap Advanced features → Samsung DeX, and then tap the Auto start when
Book Cover Keyboard is connected switch to activate it.
1
Position the tablet's rear camera to insert it into the rear camera hole and put the tablet in
the stand.
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