IBM ThinkPad 600X - Setting Sensitivity

Customizing the TrackPoint
Setting sensitivity
This function adjusts the force required for both cursor movement
and Press-to-Select. To increase the force needed to move the
cursor, and to activate Press-to-Select, move the slide toward Firm
Touch. To decrease the force needed to move the cursor, and to
activate Press-to-Select, move the slide toward Light Touch.
46 IBM ThinkPad 600X User's Reference