Xerox 490ST Xerox Document Centre 490/480/470/460 Reference Guide - Page 66
Lighten/Darken, Background Suppression, Darken, Lighten, Original Type, Photo, Background, Suppression
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Lighten/Darken Lighten/Darken provides controls to adjust the lightness or darkness of the output. Use Darken (press the down scroll button) to darken the copy from light originals such as pencil images. Lighten can be used to lighten a copy when the lower contrast or the Background Suppression On adjustments are not adequate. For example, use Lighten (press the up scroll button) to copy more details in the dark areas of an original, to suppress the background from colored paper originals, and to eliminate lines resulting from paste-ups, or backside show-through. Background Suppression Background Suppression is automatically selected when any Original Type other than Photo is selected. Background Suppression automatically reduces or eliminates the background from colored paper originals or from newspaper originals. Turn Background Suppression off when you encounter the following conditions: l Using the Darken adjustment does not produce a satisfactory copy when copying very light originals l The original has a gray or colored border such as a certificate. The machine will incorrectly assume that the border of the document is the background level of the entire original and consequently cause the entire image to appear lighter l To bring out fine detail that was lost due to the dark edge or gutter when using Bound Originals Page 4 - 14 Xerox Document Centre Reference Guide