nelsonc Anfänger

Hi, I am using Aerofly RC10 from STEAM on MacOS, with both DLC installed. My issue is, that I cannot enable F3A grid from anywhere. The only grid I can see is like a cylinder (set virtual grid on), which is not good for F3A practice. I tried different sceneries, including 4D sceneries, and different planes. But still cannot find it. I see there is F3A grid from the manual, can anybody tell me the details about how to use it. Thanks, Nelson Chen