macfrog,

Would it be nice? I guess that for YOU it would be nice, otherwise you wouldn't ask for this feature. Personally, I've never felt the need to separate windows/door from their insertion openings.

I often make parts of my design invisible to make the design as a whole lighter, resulting in faster (test-) rendering, and in more fluid motion of the 3D window.

But I guess we all have our own way of making our designs, which results in different needs at specific moments.

Hans