Splitting the Screen on Your iPad
Of course, all the iPads have larger screens compared to their iOS cousin, the iPhone. (That means a really larger screen with iPad Pro.) And with iOS 9, you can exploit the extra screen real estate to make multitasking even more productive.
For starters, there’s a new feature called slide over. Launch the first app you want to use and then press your finger against the right edge of the iPad screen. Swipe left and you can drag a second running app into a sidebar area that extends out roughly one-third the way across the entire display.
You can probably think of all sorts of reasons to run two apps at the same time. Maybe you’re composing a message to a friend in the Mail app while scrolling through Safari in the smaller panel to find a place to have lunch. Maybe you’re sketching in one app while using a photo in another as a reference point.
You can switch the app that appears in the sidebar by swiping down from the top of the sidebar and tapping the icon for the alternative app.
When you’re done with that secondary app, just slide it away. The slide over feature works with Apple’s own apps as well as some third-party apps.
Useful as slide over is, you may want that secondary app to get equal billing with the first app you opened. To make that happen, press your finger in the short line that appears on the sidebar border and slide toward the center of the iPad display. Now each running app will automatically claim half the screen. Apple refers to this extension of the slide over feature as split view.
Split view works only on the iPad Air 2, iPad mini 4, and iPad Pro models.