Hi. Thank you for the inquiry. I understand that you want yo link your remote controller to your DJI Phantom 4 Pro. I will be posting the official DJI tutorial video to help you with the linking process. If you have any other concerns please feel free to post it here at DJI forum. Thank you for your support.
You are welcome. If you have any other concerns please feel free to post it here at DJI forum. Thank you for your support and have a safe and happy flying.