Microtek ScanWizard Bio Reference Manual page 61

Using the Tone Curve tool:
1. Choose the Channel in which the curve will be modified.
2. Choose the Method in which the curve will be modified. Select from Line,
Curve, or Gamma.
3. Click the Curve Pointer tool, then click on the curve to define the points
where the curve will be modified. You can then either raise or lower the
curve at that point and see changes to the image accordingly.
4. When the changes are done, click OK.
For more details on the effects of the other action buttons, see the section
"The Action Buttons".
5. To save a curve, click the Save As button. To load a previously saved curve,
click the Load button and specify the curve setting to be loaded.
Microtek ScanWizard Bio Reference Manual 55