Canon MP490 series On-Screen Manual page 580

Important
Do not touch any printed part on the print head alignment sheet.
Do not dirty the print head alignment sheet. If the sheet is stained or wrinkled, the pattern
may not be scanned correctly.
8. When Did the patterns print correctly? is displayed, confirm that the pattern is printed correctly,
use the button to select Yes, then press the
3.
Scan the print head alignment sheet to adjust the print head position.
1. Place the print head alignment sheet on the Platen Glass, then close the Document Cover
gently.
Place the print head alignment sheet with the printed side FACING DOWN and align the
mark on the upper left corner of the sheet with the alignment mark (
2. Press the OK button.
The print head alignment sheet is scanned and the print head position is adjusted
automatically.
Remove the print head alignment sheet on the Platen Glass after the adjusting is complete.
Important
Do not open the Document Cover or move the loaded print head alignment sheet until
OK button.
).