Connect the IRC Tramp port to the FC’s free UART-TX
Open BetaFlight ,enter Ports tab,under perlpherals next to the UART-TX which is connected to the IRC port of the VTX select IRC Tramp,save the settings.
Enter confifiguraton tab,turn the OSD on under Other Features,save the settings.
Enter Video Transmitter tab ,Load from file ,save the settings.(The fifile can be downloaded from the GEPRC website.)
Turn on the remote control,THR middle,YAW left,PITCH up,enter the OSD menu. The PITCH moves the cursor up and down, and the ELE right to enter the next item. Finally,save and exit.