Xerox Document WorkCentre 450c User Manual page 215

4. On the File menu, click Acquire, or click Twain and
then Acquire. The WorkCentre 400c Series Scanner
Setup dialog box displays.
5. Choose from the following options:
Paper Size
Specifies the document size you are scanning:
letter, legal, and A4.
Resolution
Sets the scan resolution. Options are fine (200 x 200
dpi) and superfine (300 x 300 dpi).
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