Added something to chimerax-trimmings that I have wanted for ages!
Added legacy Chimera-style model controls, so that one can freeze or activate specific models and freely rotate/translate them with respect to one another, without having to perform rotation & translation using separate mouse modes, & without selecting the models to be frozen/activated for motion.
Implemented as modelmotion in latest version:
If there is sufficient interest I will try to migrate this to a bundle so it can be installed/updated from the Toolshed.