Hi Gourav, Chimera does not have undo. Of course, you can hide any atoms that you want. You can use the menu or commands. Menu: Select... Chemistry... element... H Actions... Atoms/Bonds... hide The command in Chimera to hide atoms is ~display, so you could try: ~disp H (using atomic symbol H to specify by element) See help pages for Chimera menu, the Chimera "display" command, and how to specify atoms in the command line: <https://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/menu.html> <https://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/display.html> <https://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/frameatom_spec.html> For other topics or just to learn the program, see the Chimera User Guide and tutorials: <https://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/index.html> <https://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/frametut.html> However, you may want to try ChimeraX instead. We are not developing Chimera any more, so new improvements and new features are only going into ChimeraX. ChimeraX has its own website, User Guide, tutorials, etc. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Resource for Biocomputing, Visualization, and Informatics Department of Pharmaceutical Chemistry University of California, San Francisco
On Jan 3, 2024, at 10:06 AM, Gourav Das via Chimera-users <chimera-users@cgl.ucsf.edu> wrote:
Dear Elaine,
Thank you very much for the clarification. But is there any way to hide hydrogen atoms and undo any action in Chimera? I would greatly appreciate your valuable response.
Best regards, Gourav