Hi Kyle, Using "Values at Atom Positions" ( http://www.rbvi.ucsf.edu/chimera/docs/ContributedSoftware/density/density.ht...) will create an atom attribute corresponding to the density value at each atom position. Then you should be able to use "Select by attribute" to select all atoms above/below the desired threshold. Cheers, Oli. Dear Chimera-dev and users,

Does anyone now of a way to select only the atoms of a PDB that fall inside the displayed density of a volume?

Thanks in advance!

Best wishes, Kyle