Canon imageCLASS D1650 All-in-One Monochrome Laser Printer - Manual (Page 211)

Erasing Dark Borders When Copying (Erase Frame)
3JX3-043
When copying originals that are smaller than the output paper size, frame lines may
appear around the edges in the copied image. When copying facing pages from
thick book, dark borders may appear. <Erase Frame> enables you to erase these
frame lines and dark borders.
● The width of the frame to erase is increased or decreased relative to the <Copy Ratio> setting.
● <Erase Frame> is not available when using <N on 1>.
<Copy> <Other Settings> <Erase Frame> <On> Specify the width of the frame to erase
<Next> Select the original size on the <Scan Size> screen
Example: If you want to erase the dark borders and frame lines
LINKS
Basic Copy Operations(P. 192)
Copying
203