Xerox 480cx - Manual (Page 196)

6-18 Scanning
Note: You can also change Height and Width values by directly adjusting
the selection frame.
Note: Output image file size is proportional to both Height and Width.
If both Height and Width values are doubled, then the image area and
image file size will increase four-fold.
Note: Once you have confirmed or changed the size, resolution, and final
scan boundary settings, the scanning software determines the size of the
resulting scanned image and displays this information.
Descreen
This selection is used to eliminate moire patterns from the output image.
Moire patterns are objectionable patterns resulting from the superimposition
of different patterns of curves. Moire occurs as a result of differences in the
screen pattern used to print the document and the scanner electronics.
Moire may appear as checkered patterns bands or dots. Descreen
preprocessing can minimize the transfer of moire patterns into your image
file.
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