The environment: Windows 10 / FM 16 Advanced
The Issue: List Layout. I duplicate a field. the inspector's data tab correctly shows the source.
Then I configured the field as a button - single step and I get this...
The only data attributes I can access is Hide Object When everything else is grayed out.
Then I duplicated the field and removed the button no change to the data attributes.
I started development as a single file. Then changed it to separation model.