I'm trying to get good at film so I just got a canon 1000F, and I want to experiment with multiple exposures but I'm not sure how to do it/or if I can do it. It didn't come with a manual (second hand), so would the only method be to shoot the whole film, then when it's rewound feed the end out and shoot over it again? or is there some kind of setting I can use to stop it from winding onto the next frame, allowing me to expose the film again. ???! cheeers! :P