Thanks Denis, that will be useful. I often shoot film from bulk rolls so I don’t have those but many of my cameras don’t have the slot for them. What I usually do is label my rolls with masking tape, one on the cassette and one on the film can. When I put the film in a camera I take the label off the film can and put it on the bottom of the camera. I always leave the label on the cassette, don’t want to loose track of what’s in it after I remove it from the camera.