Add support for multiple paper sizes
Add options for A4, US letter (at a minimum).
I'm guessing this would be accomplished by a simple dropdown explaining the exact sizes, which would then change the global (edit and print) size.
Begs the question: Should we expect smaller paper standards left aligned (near home), center/middle, or center top aligned? My guess is center top as to continue to be held down by the clip.
Next question becomes, do we retain the 0.5" margin at the top? or only visualize that as part of its positioning? Then again, should we show the full paint area as a low transparency dotted line, then show the relative size of the selected paper type within it to help visualize where the paper is expected to be placed within the machine? This would be especially helpful with smaller card stock. I can provide a visual preview of what that might look like if my idea doesn't quite make sense.
Other paper sizes should be assumed to be center-top aligned. The mounting clip remains in the same location, and there are now little centering guides to mark where the edges of US letter and A4 should go. The 0.5" margin at the top is fixed; assume that other paper sizes also have a 0.5" margin around the full perimeter.