IBM ThinkPad 390

Customizing the TrackPoint
with the TrackPoint by putting the pointer on the program's icon
and applying light pressure on the stick.
To adjust the pressing timing of the stick, set Click Pace.
Note: If you set the pace too slow, you might notice unintended
clicks, a pointer delay, or a dragging delay. However, if
you set the pace too fast, you might find Press-to-Select
hard to use.
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ThinkPad 390X User's Reference