Hi, I'm completeley new to Sweet Home 3D, so I don't understand all the features yet. I am creating a multi-level home, and since you can't actually create a multi-level home I was just going to create each level on a different document and then have one document showing the entire outside of the building. However, my home has cathedral ceilings in some parts, and I'd like to be able to make a hole in the ceilings to show this, any way I could do this?
I also would like to make a hole in the floor, as it is three levels, and a staircase needs to be able to go "downstairs", even though the actual downstairs is on a different document. Any help would be greatly appreciated! thank you! 
