alastairstevenson
Staff member
I suspect you are using the wrong part of the configuration - the selection you need to change is under System Settings | Menu Output tab.Strangely I know when I made the fateful change it was a single operation whereas changing back was to each individual camera
The appearance varies a bit with the firmware and model of NVR, but should be something like below in the NVR web GUI :
Use the dropdown to select various output resolutions and frame rates while watching how the monitor reacts to them.