"Multi window is all very well, but it takes time to arrange your various apps each time you open them. Samsung has considered this and introduced the option to open applications in pairs, saving you valuable seconds. Simply open up any two apps -- preferably ones you like to pair together, naturally -- and then scroll down to the bottom of the multi-window panel. You'll see an arrow at the bottom -- tap this and you'll be presented with an icon showing a screen divided into two sections. Tap this to create the "pair". This newly created duo will appear at the top of the multi-window panel from this point onwards."