[Chimera-users] How to select residues/atoms only those within my cryo-EM map region

Dear all, I want to select residues/atoms only those within my cryo-EM map region so that I can highlight/color them. As I googled ("select atoms only within a map chimera"), I could find only how to select residues/atoms within certain radius from specific position/atoms. I may use phenix.map_model_cc to see which residues have higher cc to my cryo-EM map and manually select those using a script. However, I'm just curious whether there is already a good automatic chimera function that I can use to select residues/atoms only those within my cryo-EM map region. best, Doonam