Canon P-150M - Manual (Page 81)

81
When you do not want to scan colored lines and
characters
Specify the color (red, blue, or green) to be ignored (dropped out) in
the [Color drop-out] area of the dialog box displayed when you click
the [Image processing] button. The specified color will not be scanned.
When you want to enhance a particular color
Select the color (red) to be enhanced in the [Color drop-out] area of
the dialog box displayed when you click the [Image processing]
button. The selected color will be enhanced.
When you want to enhance contours in images
Adjust the [Edge emphasis] setting in the dialog box displayed when
you click the [Image processing] button.
When you want to reverse the black and white in scanned
images
Select [Reverse Image] in the dialog box displayed when you click the
[Image processing] button. Scanned images are output with black and
white reversed.