Canon MultiPASS L6000 Software Manual page 185

The Brightness and Contrast dialog box displays a thumbnail of the
original image and presents nine suggested variations with modified
brightness and contrast.
3. On the Variations tab, click one of the thumbnails that displays
modified images.
Additional suggested thumbnails, with modifications similar to your
previous selection, appear.
4. Continue clicking the suggested variations until the image appears as
you want it.
5. Click OK to apply the changes to the image. Click Cancel to abandon
the changes.
To adjust the brightness and contrast manually:
1. Select the image or a portion of the image.
2. On the Adjust menu, click Brightness and Contrast.
Chapter 7 Working with Documents in the Desktop Manager 7-41