[commoner]

The HP Dev One follows the HP EliteBook's poor design of pairing the pointing stick with 2 mouse buttons instead of 3. Without the middle mouse button, you can't scroll with the pointing stick and you'll need to use the trackpad (or apply some hack to the 2 available buttons), which makes the pointing stick a less effective tool.

[heavyset_go]

You can scroll with the Dev One's pointing stick. Just hold down both mouse buttons, as two buttons emulate a middle click.

[commoner]

I've tried that, and it was so uncomfortable to hold down both mouse buttons with one thumb that I did not find this workaround worthwhile. It was awkward using both thumbs to do the same.

[nicolaslem]

I guess this design problem is no more because the latest elitebooks got rid of the trackpoint entirely.