Canon Pixma iP90 User Manual page 86

Note When you use Borderless Printing, create the data by using the same size as the paper size, and paste
the data so that it fills the editing screen without leaving any margins. If you are using an application
that allows you to set margins, set the left, right, top and bottom margins to 0 mm or 0 inches. For
instructions on setting margins, refer to the user's manual for your application.