OK. I was thinking PV3 would be at a different location from PV1 and PV2; so I was suggesting a PV3 and a PV4, for PLC1 and and PLC2, respectively, at that remote location.
PV3 is remote from PV1/PLC1 and PV2/PLC2, but I would rather not add a PV4 just to link to PLC2. Perhaps I could have selected a PanelView Plus 7 Performance for PV3 but I expected I could find a somewhat elegant workaround to get PV3 to switch between PLC1 and PLC2, or use the VNC Viewer on PV3 to access PV1 or PV2. I have not done the VNC Viewer from a PV so I will be interested to see if/how it works.