Hi Dmitry, Take a look at the "volume" operation subcommands. There are several: add, subtract, minimum, maximum, multiply, and morph, if that counts: <https://rbvi.ucsf.edu/chimerax/docs/user/commands/volume.html#vop> I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

On Jul 20, 2022, at 7:34 AM, Dmitry Semchonok via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Dear colleagues, What are the ways to combine 2(or more) 3D Cryo-em maps in one? Thank you Sincerely, Dmitry