Canon BJC 3000 Reference Manual page 124

Launching IS Scan
2
Select the device you use. This displays a dialogue box to select the device
driver. (Normally the "Acquire" or "TWAIN" command is selected from the
File menu. Please note that the dialogue box to select the device driver
varies according to the graphics application program you use.)
Select Canon IS Scan2, then click the button to enable the settings. (e.g.,
Windows
OK or Select).
Select Canon IS Scan BJC-3000 DS, then click the button to enable the
Macintosh
settings. (e.g., OK or Select).
Using the Scanner 124