Canon IR 3025 User Manual page 12

Negative/Positive inverts everything form the original that is black to white and
everything white to black.
Examples:
1. Save toner by inverting heavily imaged areas
2. Make text easier to read
3. Use for editing purposes
Form Composition mode enables you to superimpose a previously scanned
image (image form), which has been stored in the memory of the machine, on
the output.
NEGATIVE/POSITIVE
FORM COMPOSITION
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