Oki ES9466 MFP Copying Manual page 94

3.HOW TO USE EDITING FUNCTIONS
4 Place the original on the original glass.
Place the original aligning its center with the orange-colored indicator under the original glass.
Do not place any heavy objects (4 kg (9 lb.) or over) on the original glass and do not press on it with force.
Breaking the glass could injure you.
94 Clearing Shadows in the Center of Book-type Originals (Book Center Erase)