Hi Andy, Not sure if this answers your question, but the "turn" and "roll" commands for rotation have "axis" and "center" options, as well as "models" to limit the motion only to specific models, and "coordinateSystem" to specify which model's coordinates the axis and center values will be given in. <https://rbvi.ucsf.edu/chimerax/docs/user/commands/roll.html> <https://rbvi.ucsf.edu/chimerax/docs/user/commands/turn.html> How to specify points (e.g. center value) and vectors (e.g. axis value): <https://rbvi.ucsf.edu/chimerax/docs/user/commands/pointspec.html> The "move" command does not have a "center" option since it is not relevant to translation, but it has the other options mentioned above. <https://rbvi.ucsf.edu/chimerax/docs/user/commands/move.html> I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

On Oct 31, 2022, at 2:57 PM, mailman-bounces--- via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Dear ChimeraX users

I have a density map and a pdb model opened in ChimeraX. How to move one of them to have a common axis (for both) , without disturbing the other.

Stay safe & Regards

Anindito Sen. Ph.D