Canon 4496B008AA Advanced Manual page 365

Note
If it is difficult to pick the best pattern, pick the setting that produces the least noticeable
vertical white streaks.
(A) Less noticeable vertical white streaks
(B) More noticeable vertical white streaks
2. Repeat the procedure until you finish inputting the pattern number for column G, then click OK.
For column F and G, pick the setting that produces 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.
(C) Less noticeable horizontal white streaks
(D) More noticeable horizontal white streaks
3. Confirm the displayed message and click OK.
The second pattern is printed.
Important
Do not open the Top Cover while printing is in progress.