Hi Pat,
Yes, I understand that I then have to control the visibility of the assigned class through the Navigation Palette (or class settings of the viewport). Currently I have the trim assigned to class "Door-Trim" through the classes panel of door settings. When I make the class "Door-Trim" invisible, either using my navigation palette (in my base drawing) or using the class settings of a viewport, the trim of my door does not turn off. I can also assign it to other classes and change the visibility of those classes and it still will not turn off. If I draw something else random on that class, the random thing will turn off, but still not the door trim. The *only* class that I can turn off to make the door trim disappear is the <Door Class> (overall class of the whole door object).
Wes Gardner, your sample door was helpful. I was able to get your sample door classes to work exactly as expected, both in your drawing and in mine. This would indicate to me that there's a problem with the door objects I'm using, rather than a problem with a file setting. I see that many of the classes are prefixed "Windoor", but I have not used the Windoor plug-in yet. Is it possible that this is the difference between the two? Pat Stanford, are you using Windoor or does the regular Vectorworks door tool really work as you are describing?
Thanks again.