Assetto Corsa: how do you adjust seat position/height?

I've Googled how to adjust seat height.

• I came up with: use numberpad + and - (after having enabled devapps in assetto_corsa.ini, which I did). That didn't work for me though.
• Also found: press home button and type in something with set "driverEye.y ". That didn't work for me either.

Anyone know how to adjust seat / head height? I'm tired of having the steering wheel in front of my face. I'm not four foot tall!

I've got triples