Fujitsu FI-5530C2 Operator's Manual page 39

[Gamma] Tab
Pattern
You can select one of five Gamma patterns from Normal, Soft, Sharp, Custom, and
Download.
Custom Properties
You can specify custom properties (Gamma, Brightness, Contrast, Shadow, and
Highlight) only when you select [Custom] as a Gamma pattern. Type in a numerical
value in each box or click the forward/backward arrows to increase/decrease the
numerical value. Of those items, [Shadow] and [Highlight] can be specified only
when a Color or Grayscale setting is selected under [Mode].
1.4 How to Use Scanner Drivers
fi-5530C2 Image Scanner Operator's Guide
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