Canon imageCLASS D1650 All-in-One Monochrome Laser Printer - Manual (Page 210)

Adjusting Sharpness for Copying (Sharpness)
3JX3-042
You can adjust sharpness of the copied image. Increase the sharpness to sharpen
blurred text and lines, or decrease the sharpness to improve the appearance of
magazine photos.
Adjust the sharpness
Example: If you want to sharpen text and lines written in pencil
Example: If you want to improve the appearance of magazine photos
LINKS
Basic Copy Operations(P. 192)
Copying
202