Hi Shen, If you are asking whether ChimeraX has similar features to Chimera: (1) yes, ChimeraX has a volume viewer tool and "volume" command for density maps, with many of the same options as Chimera <https://rbvi.ucsf.edu/chimerax/docs/user/tools/volumeviewer.html> (2) ChimeraX has the same fitting into maps as Chimera <https://rbvi.ucsf.edu/chimerax/docs/user/tools/fitmap.html> (3) ChimeraX also includes segmentation <https://rbvi.ucsf.edu/chimerax/docs/user/tools/segment.html> (4) similar to Chimera's Volume Tracer, ChimeraX has markers and links and tools for placing them into maps <https://rbvi.ucsf.edu/chimerax/docs/user/tools/markerplacement.html> Details between the two programs are not exactly the same, however. There may be some specific thing you need that still requires Chimera, but you can certainly use both programs. To ask questions about ChimeraX specifically, you may wish to use the other mailing list chimerax-users@cgl.ucsf.edu CC'd here. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

On Apr 26, 2022, at 5:13 AM, Han, Shen via Chimera-users <chimera-users@cgl.ucsf.edu> wrote:

Hi Elaine, I want to ask some questions regarding displaying tomogram in ChimeraX. is it possible to reveal the density in the tomogram and trace the objects throughout the tomogram (also docking model in the density) in ChimeraX? Best wishes, Shen _________ Dr. Shen Han Postdoctoral Researcher Max Planck Institute for Multidisciplinary Sciences Department of Molecular Biology / Cramer Lab Am Faßberg 11, Göttingen 37077, Germany