I've recently installed JOSM. It indeed makes mapping a lot easier. However I don't understand how to create islands. When I try, they don't render correctly, so I assume i'm doing something wrong.
I have an example: I'm currently trying to create two islands in a huge river: Topech Island, and Notchien Island. If I remember correctly, I created the coastline on JOSM, created a multipolygon and then went on the ID editor to tag the multipolygon as Island.
However, the islands aren't showed on the map, only their names are. What did I do wrong?
Thanks and happy mapping!