So I have been playing with the new split screen function on my iPad pro. frustrated to learn that not all apps support the split screen function. Specifically I can not use Paper (by 53) in split screen on the iPad. I also wish that apple would extend the mini viewer into it's photo app as well. Would be nice to have a photo in a mini viewer while you had an illustration app open so you could draw from the photo without having to go into split screen function. I like the split screen function, just wish it was not program dependent.