Ring 2 How to adjust motion distance

Hello every one.I got this Ring doorbell 2, i did not find a way to adjust motion distance, i want to adjust the distance to 10 feet max.I don't see an adjustable slider after i turn On/Off my motion zones.When i click on edit motion zones the window will go to full screen and the only option i see is to turn On/Off the zones, nothing else.Did they disable this option in the last ring doorbell app update?Thanks for any help