I am using 2012. I struggled with getting a handle on the use of configurations and display states in this first top down assembly project. As a result, I have several of each in my current assembly. I have some drawings made of the parts in this model. Now that the design is pinned down to a particular configuration, I would like to delete all configurations and display states that are not currently being referenced (used) in my current existing drawings. This is mainly to "clean-house" on the assembly before spanking out several remaining part drawings. OK - here is the question - is there a way to do like a properties check or something like it (sorta like a parent-child check) for each configuration and display state (doing this within the assembly file preferably) to see which ones are currently being used-referenced in my existing drawings? I have tried several things with no luck. I realized I can go into all the drawings one at a time and make a list of what config and display each view is using but that is a pretty tedious approach.