Many thanks. I implemented as you suggested and made a minor tweak:

Level selectedLevel = this.home.getSelectedLevel();
if (selectedLevel.getName().equals("All")) {
return true;
}
...

This way I only have one level that exhibits that behaviour.

I do have one question though. I managed to ...

Thanks very much for the offer. Could this be done as a plugin?

Well, that might work but that would definitely make the 3D view ugly. Transitions between levels would not show since I could no longer have steps between the levels. And one of the big advantages of the 3D view is the ability to walk through the house and see the lines of sight accurately. Doing ...

It would be nice to have a level which displays all (or specific) levels below it regardless of the elevation of those levels.

I would use this feature create a plan view to send to a contractor for a rough estimate. My house has multiple levels on the ground floor due to the terrain on which it ...

Thanks for the clarification. I'll put this in as a feature request. It might be useful to others who have a multi-level house with rooms adjacent but not on separate floors (storeys).

Thanks for the quick response.

I assumed that it worked the way you describe but this has not been my experience. Some elements (furniture, rooms, walls, etc.) of the lower layers do not show up in some of the upper layers. I have a layer called "All" whose elevation is above all the others but not ...

Sorry, I should have been more specific. I mean show all levels in the 2D view so that I can print a plan view (2d) to give to a designer/contractor.

Is it possible to have a level which displays all (or specific) levels regardless of the elevation of those levels?

I would like to create a plan view to send to a contractor for a rough estimate. My house has multiple levels on the ground floor due to the terrain on which it was built. For ...