How To Use Split View in OS X El Capitan on Mac

New in OS X 10.11 is feature Split View, which allows you to focus on two apps on your screen, side-by-side in full screen mode. 

To activate Split View mode in OS X El Capitan, press and hold the Green traffic light button on the Apps windows, wait a second, then drag the window to the side of the screen you want the app be on. You can then choose which other app you want on the other side of the screen. 

In Split View, you can drag the middle line to give more space to the left or right app. To exit Split View mode, press the Green button again.