Galaxy Note 3 comes with the awesome Pen Window mode that allows you to draw an approximately square or rectangular shape on the display, and an app of your choosing can be opened in that size, while you can still operate what's behind it, for some quick multitasking. The thing is that Samsung only allows its default apps to be opened like that, while your beloved third party applications are left out in the cold from the Pen Windows functionality. If you want to run any app like that, you'd have to root the Note 3 first, then follow the instructions inside...Source: http://www.phonearena.com/news/How-to-open-any-app-in-Pen-Window-mode-on-the-Galaxy-Note-3_id48340
