Canon PIXMA MP810 Quick Start Manual page 11

Important
Do not place any objects weighing more than 4.4 lb / 2 kg on the Platen Glass.
Do not press or put weight on the original with pressure exceeding 4.4 lb / 2 kg.
Doing so may cause the scanner to malfunction or the Platen Glass to break.
Note
The machine cannot scan the area within about 0.04 inches / 1 mm from the rear edge, and
within about 0.04 inches / 1 mm from the left edge of the Platen Glass.
You can also scan in originals that are up to 0.98 inches / 25 mm thick, such as books. Set them
on the Platen Glass in the same way as paper documents.
2
Gently close the Document Cover.
Before Printing 7