Canon PIXMA MG4200 Series On-Screen Manual page 567

Align heads manually
Usually, the Print Head Alignment function of Test Print on the pop-up menu in the Canon IJ Printer
Utility is set to automatic head alignment, but you can change it to manual head alignment.
If the printing results are unsatisfactory even after you execute automatic head alignment, see
"Aligning the Print Head Position from Your Computer," and execute manual head alignment.
Check this check box to perform the manual head alignment. Uncheck this check box to perform the
automatic head alignment.
3.
Apply the settings
Click Apply and when the confirmation message appears, click OK.
The machine operates with the modified settings hereafter.
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