Digital Research Technologies DRSCAN36EPPR - Manual (Page 20)

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! NOTE: The Gamma Curve button is an option only if you
have chosen Color or Gray as your image mode.
To adjust the gamma curve, do the following:
2. After prescanning, click on the Gamma Curve button on the
TWAIN screen.
A graphical mapping of the gamma curve is displayed.
3. To adjust the gamma value, first click on the color for which
you’d like to adjust the Gamma Value. You can adjust all the
colors at once by clicking the multi-color button, or the
individual colors by selecting their respective buttons.
4. Then click on the black dot in the center of the diagonal line.
As you drag this, you will see changes to your scanned
document. When you are satisfied with the changes, close
the window by clicking the box in the upper right hand corner.
The Auto Settings
Reset button