Canon MX720 Series Online Manual page 109

The confirmation screen will appear.
(5) Select Yes, then press the OK button.
The print head alignment sheet will be printed and the print head position will be adjusted
automatically.
This takes about 4 minutes.
Important
Do not open the ink cover while printing is in progress.
Note
If the automatic adjustment of the print head position has failed, the error message appears
on the LCD.
A Message Is Displayed
(6) When the completion message appears, press the OK button.
The screen will return to the Maintenance screen.
Note
To access other available functions, use the mode buttons or the MENU button.
If the print results are still not satisfactory after adjusting the print head position as described above,
adjust the print head position manually.
From the machine
Aligning the Print Head Manually
From the computer
Aligning the Print Head Position Manually from Your Computer