Canon PIXMA IP1500 Quick Start Manual page 42

Printing Maintenance
4
Align the Print Head.
(1) Look at the print out. From the patterns, select the most even, least irregular
patterns and enter the number that corresponds.
Note
Less noticeable white stripes
(4) When the confirmation message is displayed, click O O K.
38
If it is difficult to pick up the best pattern on Column H, pick the setting
that produces the least noticeable vertical white stripes.
(2)
Enter the numbers.
(3)
Click O O K.
More noticeable white stripes