Canon imageCLASS D1650 All-in-One Monochrome Laser Printer - Manual (Page 208)

Enhancing and Adjusting Copy Quality
3JX3-040
You can improve the copy quality by specifying more detailed settings, such as selecting the optimum image quality,
erasing unnecessary shadows, etc.
Selecting the Type of Original for
Copying(P. 201)
Adjusting Sharpness for Copying
(Sharpness)(P. 202)
Erasing Dark Borders When
Copying (Erase Frame)(P. 203)
Copying
200