Hello, Recently, for some reason, the settings changed on Chimera such that the atoms and side chains do not change color when I try to change the lighting settings. Thus when I get the protein (in ribbon format) to look appealing and shiny, the metal atoms in the protein remain black. Changing colors or lighting do not make any difference. The same is true for the side chains as well. This also occurs on several different sequences, so it is not just the one file. Sorry for the seemingly trivial question, but I have poked around for a while at the different settings and can't seem to find how to undo this change. Thanks for your help! david -- david bunck bunck@caltech.edu (626) 395-8919 Postdoctoral Scholar Heath Research Group Division of Chemistry and Chemical Engineering California Institute of Technology