Buddy boxing is the practice of linking two radios together for the purpose of instructing students how to fly UAS, typically fixed wing.
Student
Open the trainer model on the controller Long hold menu and then click page until you get to the Hardware Screen 6/7 Scroll to the Local Addr and remember this address for later
Instructor
Load the aircraft model you would like to use Quick press menu page to go to the model setup page. At the bottom of this page there is a mode which should be selected as Master/Bluetooth There is a discover button underneath that you will press. A screen loads with the Bluetooth Addresses of near by devices. Select the device that matches the Local Addr on the student controller. If too many Bluetooth devices are powered on you may need to turn off Bluetooth to be able to display your controllers address. Return both devices to the home screen and check connection to aircraft Setup