Motion detection range is too long. Too much event activity is recorded

Initial set up of Ring doorbell Pro 2 worked well with 1.5 meter motion detection range for video recording for event history. I live in a terraced house with pavement less than 2 meters from the front door, where Ring doorbell is located. I had to reset ring doorbell after changing WiFi modem. Event history now records all people passing on the pavement, plus all passing vehicles. 1.5 meter motion detection range seems to have been changed on the app to 'minimum', but 'minimum' range is several meters.... Hence my problem Can anyone telll me how to change settings on Ring app, to reduce motion detection range back to 1.5 meters, which worked well?