88e06032_ure_the_TrackPoint___ThinkWiki__Type
[Name] inertia [Default] 6 [Notes] Described as "negative inertia." It acts more like friction. High values cause the cursor to snap backward when the Trackpoint is released [Type] 
Integer
I n t e g e r
B o o l e a n
How to configure the TrackPoint - ThinkWiki