Microtek ScanMaker IIG User Manual page 157

To use the Auto control:
Click on the Preview button to preview the image.
1
2 Click on the Scan Frame tool, and draw a scan frame of
the area where Auto will be applied.
3 Click on the Auto button in the Settings window. The
option will be checked when it is enabled. If you do not
like the results obtained by Auto, or if you choose not to
use it for certain images that have Auto enabled, click on
the Auto button again to deselect the feature.
Important: Do not use the Auto setting with Color
Correction.
Original
Note To see how color images compare with and without
the Auto control, see the color pages in this manual.
Auto applied:
Contrast is optimized
Reference: The Settings Window 5-49