I have a wall family that is a brick veneer with a drywall interior. I want to limit the drywall to only extend 9' above the floor. I see how to unlock the layer of material that represents the drywall but when I do that it shows up on the outside of my wall where the drywall was taken away. How do I solve this?
Try using Parts. Is there a layer of studs/framing between the brick and drywall? If so--it should "cover" up the brick.
If not, if you create Parts, you can then control the brick part and drywall part separately.
Parts were added in Revit 2012--and much improved in 2013.
If you select your wall, simply click "Create Parts" in the Modify tab in the ribbon.
You will need to check under Visibility settings in your Views to Show Parts, Show Original, or Both.
You can even Divide Parts, and assign different Materials within the Divided sections.
I think using Parts might help with your situation.