I see, now it makes sense. Thanks for the explanation. Due to the fact that all maps in the GM mode had 1 region only, I had linked "region" to "level" in my mind. Unfortunately I don't have the experience or the time to make decent stuff with the editor, so I'm just using the ready maps plus some from mods. I was hoping to making transitions between those maps with interactive objects such as hatches, cave entrance etc. However since they are all different levels , I see now it's impossible. I will wait for some mod with a level that includes regions then.
