Also it would be interesting to add SEQCROW capability Tony Schaefer described to run certain commands when a model of a given type (volume, atomic structure) are opened to the ChimeraX core.
The SEQCROW capability is for models of a certain format (e.g., PDB, cube, Mol2), not type/class. Chimera had "New Molecules" and "New Surfaces" preference categories. I suppose ChimeraX could have a "New Models" settings category, with subsections for various model types, where you could specify commands to run when models of that type were opened.
--Eric
Eric Pettersen
UCSF Computer Graphics Lab