I have created the first level of a game in the editor using a tile layer. I'm now working on level two and would like to copy / paste selections of tiles (a tree or other complex structure) from the first level into a second level, but I can't figure out how to do it (should I be able to do it?).

First question is, is this currently possible and if so, how does it work? If it's not possible, can support for copying tiles between levels be added? (I understand there could be complications with this as tile sets can vary between levels.) If it's not possible to use cut / paste, could "tile prefabs" be added to tileset panel so we can stitch tiles together and use them like brushes?