Canon imageCLASS D1650 All-in-One Monochrome Laser Printer - Manual (Page 310)

Adjusting Density
3JX3-05W
You can adjust the density of the scan if the text or images in a original are too light
or dark.
Saving Data to a USB Memory Device
<Scan> <USB Memory> <Density> Adjust the density <Apply>
Sending Data by E-Mail/I-Fax or Saving Data to the Server
<Scan> Specify destinations in <E-Mail>/<I-Fax>/<File> Select <Density> in the <Send Settings>
tab Adjust the density <Apply>
LINKS
Basic Operations for Scanning Originals(P. 281)
Sending I-Faxes(P. 246)
Adjusting Sharpness When Scanning (Sharpness)(P. 303)
Scanning
302