Picture-in-picture multitasking for iPad in iOS 9: Explained

[iMore.com]

Apple calls the new features they're introducing in iOS 9 "multitasking", but the iPad has always multitasked. Over the years, it's gone from system multitasking to background tasks to background refresh. What it hasn't done until now, however, is run two apps on the same screen at the same time. That's where Picture-in-Picture (PiP) comes in.

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