Samsung SM-N960W User Manual page 169

Apps and features
Pop-up view
1
Tap the Recents button to open the list of recently used apps.
2
Swipe upwards or downwards, tap and hold an app window, and then drag it to
Drop here for pop-up view.
The app screen will appear in the pop-up view.
Moving pop-up windows
To move a pop-up window, tap the window's toolbar and drag it to a new location.
169
Minimize the window.
Close the app.
Maximize the window.