Forgot to mention that the "copy" command is for atomic models.  There is a "volume copy" for volume models such as density maps:

<https://rbvi.ucsf.edu/chimerax/docs/user/commands/volume.html#copy>

Elaine

> On May 15, 2023, at 6:24 PM, Elaine Meng via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:
>
> Hi Tim,
> If you just want to change the model number of the existing model (as opposed to having two copies of that model) you can do that by simply double-clicking the model number in the ID column of the Models panel and editing it.
>
> Or, if you prefer using a command, you can do the same thing with the "rename" command "id" option:
> <https://rbvi.ucsf.edu/chimerax/docs/user/commands/rename.html>
>
> Editing the model name or number directly in the Models panel actually generates the corresponding command and shows it in the Log.
>
> If you wanted two copies of the model, you can use the "copy" command to make another copy with the specified name and model number.
> <https://rbvi.ucsf.edu/chimerax/docs/user/commands/combine.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 May 15, 2023, at 6:14 PM, tim smith via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:
>>
>> Hello everybody,
>>
>> I would like to create copy of the model in the same session but with a different model number. Please, could you suggest how to do that. Thank you.
>>
>> Best
>> Tim
>