Canon imageFORMULA CR-80 Instructions Manual page 53

Pull out the document feed tray.
Load two checks or check-stock paper together.
Separation Roller
Feeding Roller
Paper Thickness
Adjustment Dial
Slide the two sheets through between the feeding roller and
the separation roller and stop at the position shown below.
NOTE
If you were unable to slide both sheets through the gap between the rollers,
turn the paper thickness adjustment dial counter-clockwise (left) until both
sheets two pieces easily slide through the gap.
Gently remove one of the sheets.
Two Sheets
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