Canon BJC 3000 Reference Manual page 118

When using IS Scan Plus
Windows Select Capture Image from the Main menu screen. Click the Custom but-
ton in the Scanning Mode box, and then select White Level from in the Cus-
tom Settings dialogue box.
When using IS Scan directly as a stand-alone application program
Select Settings from the Main menu screen, then select White Level in the
Macintosh
dialogue box.
When using IS Scan from within a TWAIN-compliant graphics application
program
Select White Level from the Option menu.
Windows
Select Settings from the Main menu screen, then select White Level in the
Macintosh
dialogue box.
Using the White Calibration Sheet
Using the Scanner 118