Sharp MX-B356W Quick Start Manual page 28

BEFORE USING THE MACHINE
SCANNING FUNCTIONS
Background Adjustment
You can adjust the background by making light areas of the
original darker or lighter.
Erase
The erase function is used to erase shadows on images
produced when scanning thick originals or books.
Without erase
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Slow Scan Mode
Use this function when you wish to scan thin originals using the
automatic document feeder. This function helps prevent thin
originals from misfeeding.
With erase