[Chimera-users] centering on an atom

In UCSF-Chimera, I would like to center on an atom of a molecule without zooming-in towards the atom. I found the "focus" command, which centers the atom, but the command includes a zooming-in step; is there a "focus" or "center"-like option that does not zoom-in? Also, most visualization programs have a simple, one-click mouse-button to center on an atom; I cannot find this option in UCSF-Chimera. Sirano