Canon MF515 Series User Manual page 127

<+>
Makes the background color darker.
● When you set <Background> to <Auto>, automatic adjustment is performed so that the background
color becomes white. In this case, <Original Type> is automatically set to <Text> (
Document Type(P. 116) ).
LINKS
Basic Copy Operations(P. 106)
Adjusting Sharpness(P. 119)
Copying
118
Selecting