Working with two windows or apps side-by-side became much easier since OS X 10.11 El Capitan, thanks to Split Screen view. By holding down a left-click on an app's green maximize button in the top-left hand side, you can then drag it to be positioned on the left or right-hand side of the display. You'll then need to pick a second open window or app to snap to the opposite side. Split Screen obscures the launcher and OS X's Menu Bar, so you get a bit more screen real-estate and fewer distractions. Dividing the separating line between the two apps lets you make them smaller or larger, which can come in handy for keeping an eye on live information such as sports scores at one end while being productive on the other.