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.
Press your S Pen near the edges more often and calibration adjusts accordingly.
What I did is, I execute Phone and Application using S Pen :)
Continue testing here
Dial *#0*# using phone dialer.
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.
Photoeditor. Able to draw all the edges, but there are a few millimeter blind area at the bottom. Outside of the image.
S Memo do have blind area at the bottom. We can't stretch the image to 100% full screen.
Other Tips
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.
5. Calibrate Horizontal and Gyroscope. Check out Setting > Display
How about you?