Here is a suggestion I would find very useful: Reusable pieces of your map, probably not the best example of a proper interface, but it shows what I mean. It would also be possible to place a LVZ image inside a piece. This would be very useful to place a lot of trees in a map for example. Such a tree would contain solid tiles and a LVZ image. Instead of going to the edit LVZ dialog, adding a new object id, placing it on the map, setting tiles under it. You just need 1 click per tree.