1. Plug in your radio to the computer, choose Joystick mode if prompted from the radio.
2. Launch the game, go to Options -> Radio & Gamepad
![FPVSIM Gamepad Calibration View](/q/client/glbs/howtos/gamepad.png)
3. If you are using DJI controller or X-Lite controller, be sure to choose the correct controller type. Otherwise, leave it as "Generic"
![FPVSIM Gamepad Calibration View - DJI/X-Lite/Generic controller types.](/q/client/glbs/howtos/controller-types.png)
4. Then click on the "Calibrate Controller/Gamepad" button to enter the calibration tool
![FPVSIM Gamepad Calibration View - calibration tool button.](/q/client/glbs/howtos/calibration-tool-button.png)
5. Follow the instruction in the tool to finish calibration.
![FPVSIM Gamepad Calibration View - calibration tool view.](/q/client/glbs/howtos/calibration-tool.png)