Canon CanoScan D646U User Manual page 14

Copying
The copy button can be linked to printer drivers that appear in the [Printers]
folder, found by clicking the Windows [Start] button and selecting [Settings]
and [Printers]. If two or more printers are connected to your computer,
ScanGear Toolbox can switch between them. Both local and network printers
can be linked to ScanGear Toolbox.
Custom Buttons 1-3
TWAIN-compatible programs can be linked to the three customizable buttons
in ScanGear Toolbox. With this feature, an image can be scanned, the program
started and the scanned image loaded into the program with a single click of a
button.
When you make installations using CanoScan Setup Utility CD-ROM,
the application softwares installed simultaneously are automatically
registered to the ScanGear Toolbox toolbar (Custom 1 to 3).
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