Canon MultiPASS F20 Software User's Manual page 58

Nozzle Check
Print the nozzle check pattern if printing is blurred or if a particular
color is not printing even though there is enough ink. You can see the
condition of the printhead by looking at the nozzle check pattern.
Load paper in the printer. Click Nozzle Check and when the
following dialog box appears, click OK. If you click OK in the next
dialog box also, the nozzle check pattern will be printed.
Do not start another operation until the nozzle check pattern is
printed.
The nozzle check pattern should appear as follows when ink is
discharged properly.
Ink Counter Reset
When you replace an ink tank, reset the ink counter level to full.
If you replaced the black ink tank, click Black Ink Tank. If you
replaced the color ink tank, click Color Ink Tank. Then click Execute.
Chapter 3
Lines missing here
indicate the printhead
requires cleaning.
Unevenness in these
patterns indicates the
printhead requires
alignment.
Printing 54