Thank you Tom. You'd think I could have guessed that. I thought it was more complicated. I was trying variations on "delete atoms hydrogen". On Thursday, December 5, 2024 at 05:50:08 PM EST, Tom Goddard <goddard@sonic.net> wrote: Hi Eric The ChimeraX command to delete all hydrogens delete H Here the H is a "selector" that refers to the element hydrogen. Tom On Dec 5, 2024, at 2:45 PM, Eric Martz via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote: I have studied the help delete.html but have been unable to guess the command syntax to delete all hydrogen atoms. Unfortunately, that help page has no examples. Please tell me the command. Thanks, -Eric_______________________________________________ ChimeraX-users mailing list -- chimerax-users@cgl.ucsf.edu To unsubscribe send an email to chimerax-users-leave@cgl.ucsf.edu Archives: https://mail.cgl.ucsf.edu/mailman/archives/list/chimerax-users@cgl.ucsf.edu/