Can't reverse elevon_output

ArduPlane Plane 3.3
1

Hello, I am new to ardupilot and I ran into a problem. I am building a flying wing with a miniapm v3.1 and I have set up everything according to this page. I had to set ELEVON_OUTPUT to 2, because the elevons moved in the same direction and I would have to change RC2_REV to -1, because the APM corrects pitch in the wrong direction, but this has no effect. What am I doing wrong?

I have attached my parameters.

2

Problem solved. I had to reverse pitch on the radio calibration page in MP. It would be nice if the developers could update the documentation.