I added the Admin Boundaries Color style to the josm style page. This should help monitor and edit the Boundary polygons. Zooming out, monitoring of areas already covered is easy with polygons fill colors, hidden nodes and thin lines. Editing is also facilitated in various ways. I also downloaded a zip file that contains both the mapcss file and the svg icon. It seems this was not the appropriate way, and no possibility that I remove the zip file and try again. Pierre
