When ZoneMinder detects an event it will save the images associated with that event to files. These files are in the JPEG format and can be viewed or streamed later. This option specifies what image quality should be used to save these files. A higher number means better quality but less compression so will take up more disk space and take longer to view over a slow connection. By contrast a low number means smaller, quicker to view, files but at the price of lower quality images. This setting applies to all images written except if the capture image has caused an alarm and the alarm file quality option is set at a higher value when that is used instead.