User`s guide

6-56 Microtek ScanWizard 5
Sliders
If you would like to set white/black points by yourself, then drag the Sliders to
adjust Black and White points of an image.
Pickers
Instead of the sliders, you may use the Black and White pickers to set the Black
and White point values from the preview image.
Auto button
Clicking this button lets ScanWizard 5 automatically judges the darkest and
whitest points, and clips excessive white/black points. The clipping percentage
of the white/black points can be manually modified in the Preferences command
from White/Black Points Setup menu.