Where do I find the app divider to drag it and utilize two apps at the same time on the iPad Air 2?
iPad Air 2 WiFi, Cellular, iOS 9.3.3
iPad Air 2 WiFi, Cellular, iOS 9.3.3
this is what I could find from Apple but it appears to be what you have as well.
About Multitasking on your iPhone, iPad, and iPod touch - Apple Support
http://ios.wonderhowto.com/how-to/run-two-apps-side-by-side-your-ipad-ios-9-0162 416/
These provide a decent explanation of how both Slide Over and Split view work:
About Multitasking on your iPhone, iPad, and iPod touch - Apple Support
http://help.apple.com/ipad/9/#/iPad63ea0cbb
These features are NOT available for all apps.
Also, you may need to enable it in Settings>General>Multitasking.
Where do I find the app divider to drag it and utilize two apps at the same time on the iPad Air 2?