I don't have a D80, and I don't know the Potensic-G app, but looking at some screenshots of it, there seems to be an orbit button at the top of the app screen. (and it's probably somewhere in the manual too). Also look at the video below, where the poster just touches the orbit/circling/point of interest button on the left hand side of his app screen and off it goes. However, the video poster is using the X-Drone app and not the proprietary Potensic-G app. I don't know why, maybe he just prefers it - or perhaps he's had problems with Potensic-G..... X-Drone seems to work OK for him.
If you are getting problems with Potensic-G then maybe changing FPV apps will solve your problem. If you still can't get it to work, then please report back here, describing in more detail exactly what the problem is. There are other, probably useful, videos about this drone on YouTube if you search.