Gimbal Control Camera

Need help setting up camera gimbal control.
I use Ground station Herelink HD Video
It is the movement of the camera: right, left, top-bottom, zoom.
It is control by touch. (slide your finger across the display)
I have attached a link to the video.
https://www.youtube.com/watch?v=WKXjgQ61GzU&list=LLS9NVwKMrxfPbq3L05qZGVg&index=58&t=0s
Watch carefully the section Time 2:22 - 3:18