Film has not rewound but has 'reverted' to showing
On the toplate of the camera, to the left hand side, is a button which slides to the left. It is marked with a film cassette outline, and two arrows to the left <| <|
At any time, you can use this button to rewind the film back into the cannister. It should make a whirring noise for 5-10 seconds, and will stop automatically.
If it makes no noise, you may have a flat battery, or the film may already be rewound.
You can insert new power (battery) without affecting the film cassette, if need be.
However, if really unsure, then:
1) Slide the rewind button to rewind(i.e. to the left).
2) Familiarise yourself with where the back opening latch is.
3) Go into a pitch black room. Preferably under a quilt in a pitch black room.
4) Open the back and take out the cassette. If it comes freely, its probably fully rewound. If its still attached to the take-up spool by film, then (holding the film by the edge only) pull on the film to release it slowly from the take up spool. Whilst it can be quite a tug, they are designed to let go of it "under protest". (Do not pull it so hard that you strip the gears, but fairly firmly).
5) Using the spool winder on the top of the cassette, wind the trailing film back into the cannister. If you've never seen a 35mm cassette, then in the dark one end has an elevated round part, the other end has a void into the cassette. You can tell the elevated part, and start winding - it should only wind one way and feel like its winding onto the reel (wind the other way and it feels like its unwinding - even in the dark!)
6) Only when you are sure film is in the cannister, can you turn on the light.
Films are very sensitive to light, so if you do not feel comfortable doing this procedure in total darkness, go to a photo processing store who will do this for you, usually for no charge (other than the hope you'll let them process the film). They put your camera in a sort of black pillowslip, but the procedure is the same.
Hope this helps
Is there a way to change this setting?
Never mind, I understand what you mean. "S" is the start, I get it. Thank you for the help.