Canon MX720 series Online Manual page 101

Reducing show-through in text documents or lightening the base color in recycled paper,
newspapers, etc. when scanning documents
Set Reduce Show-through to ON.
OFF
Sharpening slightly out-of-focus images
Set Unsharp Mask to ON.
OFF
Reducing gradations and stripe patterns
Set Descreen to ON.
OFF
Note
Printed photos and pictures are displayed as a collection of fine dots. "Moire" is a phenomenon where
uneven gradation or a stripe pattern appears when such photos or pictures printed with fine dots are
scanned. Descreen is the function for reducing this moire effect.
Reducing dust and scratches
Set Reduce Dust and Scratches to Low, Medium, or High according to the degree of dust and
scratches.
None
ON
ON
ON
Medium