Canon 630 - page 125

Print Quality is Poor or Contains Errors 125
Troubleshooting
Macintosh
1 Open the Page Setup dialog box.
2 Click [Utilities].
3 Select [Test Print] from the pull-down menu, and then click [Print Head
Alignment].
Follow the instructions on the screen.
Note ➤Straight lines can become misaligned if the paper thickness lever has been
moved. Aligning the print head may also resolve this problem.
■Remove the print head and then reinstall it correctly.
After reinstalling the print head, ensure you align it.