There is a special add-on for WinCE system that is used for calibration.
It can be added next to any program and be called by it, that's why you thought it was a Primo feature.
I had it a long time ago, the question is whether I will be able to find it (if someone on the Forum has it, he will post it).

In the meantime try this:
in sys.txt file under the debug section, add calibration line:
[debug]
screen_calibration=1
autosave=1

The second line is there just in case ...



Refrain from commenting of other members of other Forums.
I'm pretty sure you never showed up there after that, just like you won't here either