[Chimera-users] how to display specific residues and atoms in chimera

Hello, I am new to chimera. I am trying to make an animation of an actual reaction. I have the frames saved as pdbs. I guess one can use the MD movie tool to make the animation in chimera. However, I want to show only specific residues and atoms from my active site in the movie and not the entire system (my system is a ribozyme). I played with chimera for a while, but could not figure out how to do that. It will be great if I get some help regarding this issue. Thanks a lot. Regards, Abir