Thank you Hy,

currently I can only test the ui in the simulator.

There is a discrepancy between your explanation and the information label.

hy wrote: At this point, you first correct the mount's altitude error by adjusting your altitude knob such that your selected star moves along the yellow line.
When the star reaches the end of the yellow line, and meets the green line, adjust one of your azimuth knobs so that the star moves along the green line.
Once you've completed that, you're done. Click done.