Canon Pixma MG3550 Online Manual page 387

Note
When Plain Paper is selected for Media Type on the Main tab, borderless printing is
not recommended. Therefore, the message for media selection appears.
When you are using plain paper for test printing, select Plain Paper, and click OK.
Expanding the Range of the Document to Print
Setting a large amount of extension allows you to perform borderless printing with no
problems. However, the portion of the document extending off the paper range will not be
printed and for this reason, the subjects around the perimeter of a photo may not be printed.
Try borderless printing once. When you are not satisfied with the result of borderless
printing, reduce the amount of extension. The extension amount decreases as the Amount
of Extension slider is moved to the left.
Important
When the amount of extension is decreased, an unexpected margin may be produced
on the print, depending on the size of the paper.
Note
When the Amount of Extension slider is set to the leftmost position, image data will
be printed in the full size. If you set this when printing the address side of a postcard, the
postal code of the sender is printed in the correct position.
When Preview before printing is checked on the Main tab, you can confirm whether
there will be no border before printing.
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