@JimW This may be broader than entertainment only so feel free to move this to General if that makes more sense.
Basically, why does the Visibility tool work differently on Design Layers vs View Ports as it pertains to what class get's highlighted when hovering over Symbols and PIOs? For example.... when I use it on a Design Layer over a generic run of P&D with the Softgoods Tool, it will highlight whatever the assigned master class of that layer is. IE: Scenic-P&D, so the item level. However, highlighting that same piece of P&D on a viewport it highlights 4-SGTS-Drapery (the pieces level) why is that? The same thing seems to happen with symbols. As @C. Andrew Dunning would say the Macro vs Micro.
Class Breakdown from Softgoods Toolset.