Hi, I have trouble coloring only a narrow range of residues (1-10) in one chain (P) of one model (#18). I've tried a few options: color sequential #18/P:1-10 This colors the entire chain P in rainbow colors (equivalent to atom selection #18/P). color sequential #18:1-10/P This colors _all_ residues of all chains in model #18 -- except of one chain which lacks residues 1-10. I also tried with the "rainbow" synonym. When this failed, I tried coloring according to the residue number: color byattribute r:number #18/P:1-10 This throws an error "Unknown/unregistered Residue attribute number", although number should be an attribute of residues according to this page: https://www.cgl.ucsf.edu/chimerax/docs/user/attributes.html#residue Am I doing something wrong? Is this feature not implemented yet? Is there a work-around? Regards, Daniel N?r du har kontakt med oss p? Uppsala universitet med e-post s? inneb?r det att vi behandlar dina personuppgifter. F?r att l?sa mer om hur vi g?r det kan du l?sa h?r: http://www.uu.se/om-uu/dataskydd-personuppgifter/ E-mailing Uppsala University means that we will process your personal data. For more information on how this is performed, please read here: http://www.uu.se/en/about-uu/data-protection-policy