[Chimera-users] more questions about visualizing the backbone.

Last week I asked a question regarding about how to visualize the backbone atoms. I have figured that out. I am working with a peptide that forms an amyloid structure. The peptide strands form a beta sheet. When I select two of the peptide units that are hydrogen bonded to form two strands in the beta sheet, the strands are shown as a coil type structure rather than a flat beta strand. How can I change the coil backbone to a beta strand structure? Second part is there a simple way to suppress the side chains but leaving the backbone atoms? I have included two peptide units that are hydrogen bonded to one another. Thanks Arthur G. Szabo