Samsung SF-4500 User Manual page 192

Conversely, if you deform the curve into a concave shape (below the
original diagonal), the enhanced image will be darker than the original.
Operation:
1. Click on the Tonal Map icon in the Preview window or the Tonal Map
tab in the Enhancement dialog box. The Tonal Map dialog box will
appear.
2. Click on the Tonal Map curve, a handle appears which can then be
dragged to alter the shape of the curve, as described above.
3. Click Save to save the changes as a customized setting. A Save As dialog
box will appear upon selection of this button. Enter the name for the
customized curve and click OK.
4. Or, select the Load button to load a previously saved Tonal Map. An
Open dialog box appears for you to open the desired files.
5. Or, click the Reset button to return the Tonal Map to the default diagonal,
as in the original.
6. Select the Histogram button to see a histogram of the changes made.
7. Select OK to accept all the changes, or Cancel to abandon all unsaved
changes.
Normal Image Darkened Image
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