Kodak RFS 3570 - Manual (Page 53)

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 Loading the Film and Slide Holders — Macintosh Computer G 4-9
3. Place your film in the bottom of the film holder so that:

Images are facing you as you would see them in real life (not
mirror-imaged).

Any edge printing on the film is readable from left to right.
Bottom of Holder Top of Holder

Film in strips can be placed into the film holder, but should be
handled with extreme care to avoid damaging the film.
4. Center the film so that the frame aligns with the hole in the holder.
5. Place the top of the film holder over the bottom so that to top is
aligned over the four pins.