Samsung SM-G920F User Manual page 42

Basics
Split screen view
1
Tap to open the list of recently used apps.
2
Swipe upwards or downwards and tap
The selected app will launch in the upper window.
3
In the lower window, swipe upwards or downwards to select another app to launch.
To launch apps not in the list of recently used apps, tap MORE APPS and select an app.
on a recent app window.
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