Hi.
Added new map control – circle border. You can show circle with predefined radius in map center, and if you use find by geocoder, or places autocomplete feature or geolocation feature and get user’s position – it can change it’s center if you enable draggable for circle border.
By default it has 1 km radius, editable (you can change radius), draggable (you can change position)
All options you can override by map override. Create new one or change exists. Then assign it to map in Advanced options tab