Samsung SM-N915F User Manual page 74

Motions & usability features
Adjusting the window size
Drag the circle between the app windows up or down to adjust the size of the windows.
If Multi window is not activated, open the All apps screen, tap Settings → Multi
window, and then tap the Multi window switch to activate it. Alternatively, open the
quick settings panel and tap Multi window to activate it.
Pop-up Multi window
1
On the All apps screen, launch an app to use in a pop-up window.
2
Drag down diagonally from the left top edge.
The app screen will appear in a pop-up window.
74
Move content.
Switch to a floating icon.
Close the window.
Switch to the full screen
view.