Multi Window mode on Galaxy S9, Galaxy S9+, and Galaxy Note9 lets you view two apps side by side on a split screen. You can adjust the size of the screens and copy information from one app to the other. To begin multitasking in Multi Window mode, go to Settings, then Advanced Features, enable Multi Window and turn Use Recents on.
Galaxy S9, Galaxy S9+, and Galaxy Note9 also let you launch the two apps you often use together with a tap. On the Galaxy S9, Galaxy S9+, and Galaxy Note9, you can simply access the menu while in Multi Window mode to pair the two apps and place it on the home screen. On Galaxy Note9, swipe left to open the edge screen, then go to Apps edge to set up app pairs.
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* Multi Window functionality may vary by app.