Hello guys on QGC PX4 how i can change parameter telem2 is my receiver

QGroundControl Using QGroundControl
1

hello can u guys help me with QGC px4, i connected rp1 elrs receiver thru telem2 port how can i change parameter like telem2 is my receiver

2

RC_PORT_CONFIG needs to be set to TELEM2.

3

I cant find that parameters