Activating the camera's C1 or AF-ON function
By pressing the C1 or AF-ON button on this unit, you can activate the function assigned to the camera's C1 or AF-ON button*.
For details about the camera's C1 or AF-ON button, refer to the Help Guide of your camera.
* Depending on the camera you are using, the C1 button, the AF-ON button, or both may not be available.