Distance circle around own receiver location

Sorry if this is in the wrong place or has been covered before, I did a search but found nothing.

Would it be possible to add a feature such that users can click on their receiver location and select to add concentric distance circles at various radii on the Live Air Traffic Map, please.

This would allow users to better gauge the distance of aircraft from them.

ps if the facility already exists and I've not found it, please point me in the right direction.

Thanks.