Description of "hold shift + click then hold middle mouse button = rotate around point" is confusing.
Much better, and much less confusing (IMHO) is: "hold shift + click middle button = set orbit center"
After setting orbit center, then use "hold shift + hold middle mouse button = rotate" as before - this is always true, regardless of whether center has been repositioned or not.
Thus normal action is to rotate, set center, and rotate again etc.
This change is to documentation only - this is how F360 already functions!