Samsung Galaxy S8 - Manual (Page 47)

Learn About Your Device 40
Multi Window
Multitask by using multiple applications at the
same time.
Window Controls
Tap Window controls in the middle of the
window border for options.
Snap window: Snap the selected window to the
half of the screen it occupies.
Switch windows: Switch locations between
Multi window apps.
Open in pop-up view: Open the selected app in
a pop-up window.
Close app: Close the selected app.