Canon PowerShot 5D550 Digital Elph User Manual page 206

Select a layout and press the SET button. This
ends the paper settings operations.
The display returns to the print order screen.
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• Images will print with borders, even if [Borderless] was selected
with the camera in the following cases:
-When [Plain] is selected in the camera's [Paper Type] (cannot be
selected depending on the connected printer model)
·With printers equipped with an operation panel, when [Plain] is selected
with the printer and [Default] is selected in the camera's [Paper Type].