The idea is, to touch all edges of the screen. You may move you pen on the screen side from one end to another or just by clicking on every edges. The S Pen need to detect the maximum for up or down and left or right movement before it can actually calibrate itself.
What I did is, I execute Phone and Application using S Pen :)
Continue testing here
Latest testing 7 Jan 2012. I can't really draw until the end of the bottom edges either LEFT or RIGHT.
I have no problem to draw on the TOP part.
1. Upgrade to latest ROM.
2. Just Disable Auto Rotation. S Pen good for Portrait.
3. Some experience by disable and enable auto rotation, S Pen fix.
4. Try select Setting > Pen Settings > Dominant hand > Right handed/Left Handed. Reported that S Pen will re-calibrate again.
How about you?