Canon BJC-55 User Manual page 327

3
Click the Backgrounding button off.
Note
If you cannot execute background printing, correct this problem as soon as
possible.
Make sure that the printer driver has been installed correctly
There may be a problem with the printer driver. Uninstall it and install the printer driver
again.
The problem may exist within the printer driver. Uninstall the printer driver and re-install it.
Printing With Macintosh
Cannot execute background printing
Problems and Solutions
Troubleshooting 327