Canon MultiPASS L6000 Software Manual page 196

2. On the Adjust menu, point to Advanced, and then click Remove
Dust.
3. In the Remove Dust dialog box, click Dark and/or Light, depending
on the color of the dust.
4. Drag the Threshold slider according to the deviation of the dust from
dark to light.
5. Drag the Removal slider to the left to remove less dust or to the right
to remove more dust.
Moving the slider to the right blends the dust more with the
background color that surrounds the dust. As you drag the Removal
slider, your changes appear in the Current thumbnail. You can
compare the changes to the Original thumbnail.
You can also use the zoom buttons to magnify the thumbnails.
6. Click OK to accept your changes. Click Cancel to leave the image
unchanged.
7-52 Working with Documents in the Desktop Manager Chapter 7