Canon BJC-3000 Series User Manual page 307

Aligning the Print Head
9
Check all the patterns in lines (B1) and (B2).
For each line, enter the appropriate number where you see that the lines
are perfectly aligned.
Correct:
Incorrect:
10
When you finish entering numbers...
Click the OK button to save the settings.
Windows
Macintosh Save the settings.
Routine Maintenance 307