Samsung Galaxy S6 Edge - Manual (Page 40)

Basics
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Using additional options
When using apps in the split screen view, select an app window and tap the circle between
the app windows to access the following options:
• : Switch locations between app windows.
• : Drag and drop text or copied images from one window to another. Tap and hold an
item in the selected window and drag it to a location in another window.
Some apps may not support this feature.