Sorry to derail the thread but, how do I get iCloud Drive to work? More specificially, how do I get the document picker screen up?
As I understand it, there is a window which allows me to see the documents inside other apps? So far the only apps I own which support this are Pages, Keynotes and Numbers. I have seen screenshots of Pages with an iCloud Drive window, but I cannot find any way of opening this myself.
Also, is there anyway to open the iCloud Drive document picker in mail so I can attach files? That seems like the perfect use for iCloud drive.