Canon DR-5020 Mode D'emploi page 50

3
Load one page of the document you are going to scan, and set the
paper guides for the width of the document.
4
Instruct scanning in the application.
The Start key changes color from red to green.
When the scanning mode is set to Auto, the sensor located on the document tray
shown in the figure below automatically detects the document to start scanning.
CAUTION
When something covers the sensor on the document tray after you have instructed
scanning in the application, the scanner erroneously judges that a document has
been loaded, and the document tray starts to move. Make sure that objects other
than the document do not cover the sensor on the document tray.
Sensor
5
Fan a group of pages to be scanned until the edges are even.
3.2 Document Feeding and scanning
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