How to change unity from mm to pixel

[[HE...]]

Hello all, 

I would like to know how to change the unity of displacement from mm to pixel for GOM correlate 2020?

Thank you in advance. 

[[71...]]

In general, you would go [Edit] -> [Preferences...] -> [Default Units]. I'm not sure if "Displacement" resolves to "Length" generally, but it seems we don't support conversion from mm to pixel. Note that pixel sizes depend on your monitors pixel density and resolution, so it isn't a reliable unit for precise measurements.

[[HE...]]

Thank you so much for your answer :).