Thanks. I had a feeling there was something I was missing.
I also tried to export the breadboard view and the part didn't export there, either.
The part creation tutorials here don't seem to go into such details, or if they do, I missed it.
Doing the part in Inkscape and have been using its built-in XML editor to change Inkscape's cryptic ID names to something that makes more sense. Will try to find the location to set that property.
Thanks again !