This is sort of a feature suggestion, as I couldn't find any info on how to achieve this in Weltmeister currently.

When designing levels, I often go with the flow, so changes to level dimensions are often necessary. This is easy to do when adding more stuff going down or to the right (increasing X and Y), but can't really do if I'm adding more stuff "above" or "to the left of" the editing scene.

So what I'm looking for is a sort of "Expand canvas space to the top/left/right/below current scene", sort of like inserting/adding rows/columns in a table. I think this would be a more intuitive and flexible approach to resizing the level scene.