Using Multi Window - Samsung Galaxy S5 User Manual

Using Multi Window

After enabling Multi Window, you can use it to run
multiple apps at the same time.
Note: Only apps located on the Multi Window tray can be
used together. Additional Multi Window apps are available
from the Google Play Store.
The apps display together on a split screen. You can
switch between the apps, adjust the size of their display
on the screen, and copy information from one app to the
other.
► Tap the Multi window tab to display the tray, and
then drag apps to the windows.
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Know Your Device Multi Window