Samsung Galaxy Note 4 All-New Multi Window feature will WOW you. Video.
With the All-New Multi Window feature on the Samsung Galaxy Note 4 you can have open several apps at the same time and scroll down and up all of them to select one or return to the classic two apps opened (split screen) at the same time. It is like a seamless vertical multitasking that keeps running live your opened apps.
Also you can pop up an screen and go from pop up screen to split screen. You can also minimize the pop up screen, drag and drop content from a text to your chat app and send it.