Canon MG6800 Series Online Manual page 612

Placing Multiple Items:
Allow 0.4 inch (1 cm) or more space between the edges
(diagonally striped area) of the platen and items, and
between items. Portions placed on the diagonally striped
area cannot be scanned.
more than 0.4 inch (1 cm)
Note
• In IJ Scan Utility, you can place up to 12 items.
• Positions of slanted items (10 degrees or less) are
corrected automatically.
612