Microtek ScanMaker 6400XL Reference Manual page 83

It is more convenient to use the neutral Eyedropper tool in removing or adding
color cast. Simply move the cursor toward the prescan image while the Color
Cast dialog box is only display. Notice that the cursor automatically transform Cast Cast
Cast Cast
itself into Neutral Eyedropper tool. Use this tool to click on the color cast from
the image you want removed or added.
The Neutral Eyedropper
tool auto displays when
you move cursor toward the
prescan while the Color Cast
dialog box is on
Use this tool to click and define
the color cast you want to add or
remove
Reference: The Settings Window
Color Color Color
Color
75