When you push right button to the right on MX20 you go telemetry window. The busk right button up and choose GENERAL and confirm with SET.
Now push right button to the right couple of times, and you will get:
SENSOR 1 - SENSOR 2 - 0 rpm - 0m and 0.0 m/2 - and then 0 km/h
I have a question about this "0km/h" view. I can't get it to work. even if i fly it writes 0km/h.
On the other site, on GPS status view I get correct km/h reading.

Any idea why this 0km/h doesn't change when kopter is flying?

Sorry, my fail. It works now. Delate post.