For one thing, you can now adjust how much space each app takes up on the split screen. You can set the ratio to 90:10, for instance, where one app eats up 90% of the screen, while the other app is mostly hidden away but still readily accessible. Then, you have the option to save split screen apps as an app pair. This lets you quickly open both apps together again without needing to reconfigure them. Besides these nifty features, there also a hidden Android setting that lets you open a...