I give a lot of presentations using my 10.9" iPad Air as a remote in Keynote from my MBP. I like to annotate the slides with a Pencil using the basic drawing tools in iOS Keynote. Would moving up to a 13" iPad Pro give me more space on each slide to annotate, or will the Pencil stroke scale with the screen? Intuitively I feel I would get more space on the larger screen, since a 1" line on the Air would be the same 1" on the Pro despite everything on the slide being scaled up. Is anyone able to confirm my intuition?