I feel like I should already know this one, but is there a command line
way to add an atom at specified coordinates? or at screen center? I
thought there was a new-ish pseudoatom functionality but I can't seem
to find or recall details. Can one specificy atom type as well?
I was looking to annotate a structure with some graphic landmarks. I've
used CGO spheres, etc. in the past but they aren't easily recolored and
such interactively after the fact so I'd prefer using dummy atoms of