Samsung Galaxy S7 User Manual page 48

Basics
Using additional options
Tap the bar between the app windows to access additional options.
Adjusting the window size
Drag the bar between the app windows up or down to adjust the size of the windows.
48
Add this app pair to the
Home screen.
Switch locations between
app windows.
Close the currently
selected app.
Switch the selected
window to a pop-up view.