I am running OS X 10.12.2 on a new MBP Touch Bar. I often create and edit my Keynotes with two different presentations Open at once so I can move back and forth between them to Copy/Paste, etc. Today I discovered that I can only have one Keynote, and one Pages document for that matter, Open at a time. When I Click on a second document or Keynote, the Open file disappears and is replaced by the second one. I can’t get the Two Screens option to work from the same Application either.
Thanks for helping!