[Chimera-users] how to edit pdb file

dear sir, I'm a new chimera user. Now I have some difficult to use chimera. How can I save the amino acid that I select as a new .pdb file. For example, I select the amino acids that is around the ligand within 10 A,and I want to save these residues as an another .pdb file. How can I do? Best regards, xiaogaokeng