Microtek ScanMaker 6100 Pro User Manual page 81

Pickers
The Pickers can be used instead of the sliders to set the Black and
White points, based on color values in the preview image. The
Picker on the left sets the Black point; the Picker on the right sets
the White point.
To set the White point: Click the Picker on the right, then click
on the preview image to define the reference point.
To set the Black point: Click the Picker on the left, then click
on the preview image to define the reference point.
Setup
This button provides you with advanced controls for setting the
white/black clipping points, as well as for determining the output
levels for the white/black points on your printer.
Before
Using the White & Black Point tool:
1. Choose the Channel in which the histogram will be modified.
If your Image Type is RGB, select All/Master to modify
the tone curve in the red, green, and blue color channels
of the image simultaneously; or select the color channels
individually (red, green, blue) to modify that particular
color channel.
After