HTC DROID Incredible - Manual (Page 96)

9 Keyboard
Vibrate when typing
Select to enable vibration feedback whenever you tap a key on the
keyboard.
Finger touch precision
Calibration tool
Tap to re-calibrate the keyboard touch accuracy. Re-calibrate the
keyboard if you feel that the keyboard keys are not responding
accurately to your taps.
Reset calibration
Tap to reset the calibration back to factory default.