Setting Motion Zone on Spotlight Cam Plus

I have tried to modify the motion zone on a new Ring Spotlight Cam (with solar panel) and I am unable to "grab" the handles at the very top of the default zone. I would like to move it down a little; the whole zone can be moved side-to-side but not (up and) down. I have tried this on the ring app on both iPhone and iPad with latest OS. I also tried the web view using Safari but can't even find it there. Please don't bother to tell me that the web approach won't work; please focus on the **mobile** apps not allowing me to reposition the default motion zone.