Hi @another ,
Great idea this and I’ll look at adding any shape (including a circle) around a marker, where the marker will always be central to the middle of the shape.
I may take the existing “Draw shape” action and add an option for you to specify a marker. When a marker is included into the options for that action, then the shape will be positioned so that the marker is in the middle. As for the pulsating ability, I will look at what I can do but I suspect that won’t be easy with the shapes on the map. You never know though, I may find a solution.
Leave it with me for a few days and I’ll get back to you.
Paul