Canon IMAGEFORMULA DR-2020U - Manual (Page 55)

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When you want to rotate the images of a document that is
loaded horizontally to the correct orientation
Specify the rotation angle from the [Document Orientation] drop-down
list in the [Image processing] tab.
Hint
Images are rotated according to the orientation of the loaded
document and the selected angle.
When you want document feeding to stop automatically
when a double-feed occurs
Select the [Detect by Length] check box in [Double Feed Detection] of
the [Others] tab. When this setting is enabled and a double-feed is
detected during scanning, the documents stop feeding automatically.
You can resume scanning after resetting the double-fed documents.
IMPORTANT
Additional pages may be fed, even if document feeding is stopped
automatically after a double-feed occurs. Before resuming the
scanning operation, use your application to check the last page that
was scanned successfully.
Before Using Adobe Acrobat 9.0
There are two methods for scanning a document from the scanner
using the bundled Adobe Acrobat 9.0 software. One method is
Presets (Black & White Document, Grayscale Document, Color
Document, or Color Image), in which the scanning parameters are set
beforehand. The other method is Custom Scan, which allows you to
select the parameters used for scanning. The Custom Scan method
also provides the option of either showing or hiding the scanner’s
Native Interface (the machine’s own scanner settings screen) while
scanning.
Flatbed
Document: Face down
Feeder
Document: Face up
Image rotation
(clockwise) 0
degrees
90
degrees
180
degrees
270
degrees
Output image