Hello, I have used the old Chimera quite a bit and I'm trying to get used to ChimeraX. There are a couple of tools that I found very useful in the old chimera: "focus" and "set pivot". Both were under the "Actions" menu and, with large structures like the ribosome, these two tools allowed me to quickly inspect any residues that were selected with any other tools. "Focus" is not there anymore and while "set pivot" is, it doesn´t seem to work as it used to. I wonder if these tools, in their old flavors, are still available in ChimeraX. best, Antón -- Antón Vila-Sanjurjo, PhD Profesor del Area de Genética Departamento de Bioloxía Facultade de Ciencias Universidade da Coruña (UDC) Campus Zapateira, s/n 15.071 - A Coruña - España (Spain). tlf: (34) 981-167000 ext:2267 e-mail: anton.vila@udc.es