Canon PIXMA MG2525 All-in-One Inkjet Printer (Black) - Manual (Page 81)

Important
Do not touch any printed part on the print head alignment sheet.
Be careful not to get the print head alignment sheet dirty. If the sheet is stained
or wrinkled, it may not be scanned properly.
If the print head alignment sheet was not printed correctly, press the Stop
button, then redo this procedure from the beginning.
5. Scan the print head alignment sheet to adjust the print head position.
(1) Load the print head alignment sheet on the platen glass.
Load the print head alignment sheet WITH THE PRINTED SIDE FACING DOWN
and align the mark on the bottom right corner of the sheet with the alignment
mark .
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