Canon MultiPASS F50 Software User's Manual page 91

2. If you are working with a color image, click the appropriate color
channel.
3. For the black-point, midpoint, or white-point, do one of the following
to make a change:
•
•
When you adjust the black-point, all tones in the image darker than
the selected black-point are adjusted to black.
When you adjust the midpoint, all tones in the image between the
black-point and the white-point are adjusted to the selected mid-
point.
Chapter 5
Click the appropriately labeled button. Then click the portion of
the image in the preview area that is darkest (for black-point),
lightest (for white-point), or in the middle of the tonal range (for
midpoint).
Drag the appropriate arrow at the bottom of the histogram to the
level you want.
Scanning 85