[Chimera-users] Moving molecules independently in chimera

Hi! I am a new chimera user and was just wondering if someone could tell me how to move a single molecule in chimera when I have two open. I have two separate small molecule pdb files and I want to open both in the same chimera session. I also want to be able to move one independent of the other so I can overlay the two. Once they are overlayed I would also like the option of adjusting either or moving both together. Thanks in advance for the help. David C.