Hi Hernando, I believe you want this: match #0:ADP.A #1:ADP.A move atoms First you give the atoms to match, and then there is a “move” option for whether to move the only the atoms or their whole models. As you saw, moving the whole models is the default. <http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/match.html#options> I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco

On Jan 20, 2019, at 10:12 AM, Hernando J Sosa <hernando.sosa@einstein.yu.edu> wrote:

Dear Chimera, Can somebody clarify the syntax of the match command. I am specifically trying to move several atoms (residues or ligands) to match their location in another model *without* moving the rest of the model.

e.g. match #0:ADP.A #1:ADP.A works fine but moves the whole model #0

But match #0:ADP.A #1:ADP.A atoms

Or using any other option after the atom specifications generate the following error: "an even number of space-separated atom specs are required"

According to the user-guide website the syntax is: match atom-spec1 atom-spec2 options

Not sure what the problem is. Thanks H.