How to Calibrate My Nokia N900
- 1). Slide out your stylus from its holster at the bottom left side of your N900. The stylus will help with the accuracy of the calibration.
- 2). Tap on your N900's on-screen "Menu" button with the stylus. Tap on the "Settings" option, once inside the menu. Tap on the "Screen Calibration" option in the "Settings" menu.
- 3). Use the tip of your stylus to tap the "bull's-eye" inside of the numbered targets. Tap the targets in the order prompted by the "Calibration" menu, to complete the calibration of the touchscreen.
Source...