Canon iX7000 Series On-Screen Manual page 327

Manual Print Head Alignment
Note
If it is difficult to pick the best pattern, pick the setting that produces the least noticeable
vertical white streaks.
(C) Less noticeable vertical white streaks
(D) More noticeable vertical white streaks
2. Repeat the procedure until you finish inputting the pattern number for column T, then click OK.
Select the number of the pattern from column R to column T that has the least noticeable
horizontal streaks.
Note
If it is difficult to pick the best pattern, pick the setting that produces the least noticeable
horizontal white streaks.
(E) Less noticeable horizontal white streaks
(F) More noticeable horizontal white streaks
3. Confirm the displayed message and click OK.
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