So if you have rooted device, you can try this, if this is what you are looking for:
MULTIWINDOW Apps Manager
got also app to add more apps to penwindow or if you are unrooted, to make (some) installed apps to work in penwindow or multiwindow. He/She also have app I like to use, to make shortcuts that opens app directry to penwindow, and this is what I use a lot on my NP 12.2 and Note 3. When you got huge display, why to open all apps to fullscreen when you can have those shortcuts to open them to window instead.
Other His/Her apps can be found here at Google Play