Kodak ADVANTIX 5800MRX Owner's Manual page 8

Film status indicator (FSI)
A highlighted indicator advances from one
symbol to another to identify the status of the
film inside the cassette.
8
Look for this logo to be certain that the film you buy is
made for this camera.
Look for this logo to select a certified photofinisher for
developing your film and to assure that you get all the
features of the Advanced Photo System.
Processed Negatives
Unexposed
Partially Exposed
Fully Exposed