Add a gesture that will allow for fast switching to previous active application.

With current firmware version one can set how a tablet will behave when swiping from a certain location on the screen.

I would love to be able to define a behavior where after I swipe on my tablet it instantly switches from app-1 to previous active application (a.k.a app-2). Not a single dialog box (or anything else) in between, instant jump. 

Now when I do this same gesture from within app-2 I go back to app-1.

This will make it very easy and comfortable to read and take notes on full screen with minimal effort and maximum screen available for both reading and writing - way better than split screen.