Display two apps at the same time to double the fun, or to look on the bright side of even the most tedious assignment.
How to use
Enable/Exit split-screen view
Swipe left or right from the edge of the screen and hold, to display the Multi-Window dock. Drag the app you wish to use out of the dock, to the left/right side of the screen when in Landscape mode, or to the upper/lower edge when in Portrait mode. The app will then display in a split-screen view.
Drag 
(in Portrait mode) between the split-screen views to adjust the size of each view.
To exit split-screen view, simply drag it to the edge of the screen.
Switch the position of both views
Touch and hold at the top of a
split-screen view, then drag it to the other side of the screen to
switch the relative location of both views.
Shift to a floating window
Touch and hold at the top of a
split-screen view, and drag it to the left/right side of the screen
when in Portrait mode, or to the lower edge when in Landscape mode.