Avision AV3200C - Manual (Page 35)

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4.8 PREVIEW AUTO-AREA:
Clicking on the Preview Auto-Area button
automatically crops the preview scan area to the previewed
document. This will then be the cropping area for all of the
scanned documents.
4.9 PAPER SIZE:
Select a size on the Paper Size list of frequently
used scan sizes, including business card, 5 x 3 in., 6 x 4 in.,
Letter, Legal, B5, A5, A4, A3, or your current scan area to
perform an immediate selection of your scan size.
4.10 UNITS
The Units button indicates the measuring system
that is in use(Inch, Cm, or Pixel).
4.11 DESCREEN
Click on the Descreen button to access a drop-down
menu that allows you to specify the type of document you are
scanning in order to eliminate the moiré pattern* commonly
found in printed matter. You can specify Newspaper,
Magazine, or Catalog.