Canon MultiPASS L60 Software User's Manual page 105

Toolbar
With the buttons on the toolbar, you can access settings which affect
different aspects of image tone, and give you great flexibility in
manipulating your image tone before scanning the image.
Contrast/
Brightness
Tone Graph
Viewing the tone graph gives you more detail about the tone setting.
The shape of the tone graph changes to reflect the selected channel's
current tone settings. The graph is directly editable only when the
Special Tone Curves is selected.
6-18 Scanning
Special
Gamma Tone Curves
Histogram
Chapter 6