Very interesting and informative! Here's my problem. I am building several drawing tools (labels, section markers and the like) which I want to have the behavior of PIOs (i.e. linear labels, rectangular detail markers). If I build them as tools, then they are just a group of objects or, at best, a symbol, which to my understanding then can't be edited like a PIO (i.e. editable text fields and such). Therefore it seems that I am searching for a way to get the layer information from inside the PIO, much like you can get the rotation info. Perhaps there is no way to do this, but it sure would be nice. Perhaps an addition in VW10 to the PIO "Object Properties" dialog, that asks for the "Default Layer" as well. Thanks again.