Canon Pixma MG7150 Online Manual page 450

Note
If it is difficult to pick the best pattern, pick the setting that produces the least noticeable vertical streaks.
(A) Least noticeable vertical streaks
(B) Most noticeable vertical streaks
(2) Repeat the same procedure until you finish inputting the pattern number for columns B to H,
then tap OK.
For columns G and H, pick the setting that produces the least noticeable horizontal streaks at the position
indicated by an arrow.
Note
If it is difficult to pick the best pattern, pick the setting that produces the least noticeable horizontal streaks.
(C) Least noticeable horizontal streaks
(D) Most noticeable horizontal streaks
(3) Confirm the message, then tap OK.
The second pattern is printed.
Important
Do not open the operation panel while printing is in progress.
6. Look at the second pattern and adjust the print head position.
(1) Tap I to check the printed patterns, and tap the number of the pattern in column I that has
the least noticeable vertical streaks.
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