Canon Color imageRunner C3220 Reference Manual page 286

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4-104 Adjusting the Machine
Remove the second test print from the platen glass © press
[Test Print 3].
The message <Printing...> appears, and Test Print 3 is printed.
Place the third test print on the platen glass.
Place the test print face down on the platen glass, with the black bands along the
top left back edge of the platen glass by the arrow.