I tried to calibrate the pen in portrait mode and in some areas of the screen seems a bit off (2mm or 1/16"). When I calibrated also in landscape mode and returned to portrait it was better.
I have a couple questions:
1. Are we suppose to calibrate always both modes at the same time ?
2. How accurate is the pen ? When you put it on the screen, the cursor tip suppose to be dead on the pen tip ?
3. Has the angle you hold the pen any influence ?