[chimera-dev] Help

Hi, I am using Chimera (Windows 2000) operating system. I have a protein complex with two distinct chains. I would like to find the intersections of groups of atoms between the two chains. As I understand from the tutorials for Midas, the & operator should help me. However, I get a syntax error message. Can you please tell me the correct command? Thanking you, Sincerely, Mythily Indiana University School of Dentistry