Canon GP-300 Online Manual page 436

Select "XXX Borderless" in Destination Paper Size.
5. 5. From the pop-up menu, select Page Processing
6. 6. Select roll paper width
For paper roll width, enter the same value set in the printer under Roll Paper Width.
7. 7. Place a checkmark next to Three-sided Borderless
8. 8. Complete setting process
Click Print.
If you print now, the document will be printed without margins on three sides to fit the paper size.
9. Cut the right side of the paper 9.
Cut the margin on the right side of the paper with scissors after printing.
Cut slightly to the inside of the margin as the document is enlarged to extend slightly beyond the
specified size.
To get the document to standard size, it is recommended to take measurements and cut in the correct
positions.
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