Ben
Here is the Terramodel Command Interface

What is it that this does better than the View Filter Manager other than working one Layer at a time
VFM provides
1) Layer based or Layer Group or All Layer or All Layer Group Visibility Controls (Auto All and Visible)
2) Isolate Layer - click on Layer and Isolate or Click on an Object on a Layer and Isolate
VFM does not show how many objects that are on a Layer but that is the only thing that I can see that this does that VFM doesnt do. I can see that you can type a Letter to move to a layer in the layer List and then change its properties if you know the names of all your layers - is that what you are trying to do?
We are just wrapping up a TML to manage Layers and Layer Groups that we may be able to add this capability to for example.
Alan