Canon Pixma iP90 User Manual page 62

(3) Click Print Head Alignment.
The pattern will be printed.
Note Click Check Setting to print the current setting and finish the operation.
4
Align the Print Head.
(1) Look at the print out. From the patterns, select the most even, least irregular patterns.
(2) Enter the numbers.
(3) Click Send.
Note If it is difficult to pick up the best pattern on Column H, pick a setting that produces the
least noticeable vertical white stripes.
Less noticeable white stripes More noticeable white stripes