Canon SELPHY CP510 Printer Software Manual page 17

5
Select the area you want to print.
The area inside the white trimming frame is the area that will be printed. You
can drag the edge of the trimming frame to change its size, or drag inside the
frame to move it.
With borderless printing, a solid red frame indicates the area that will be
printed. Any parts of the image that run outside of the solid red frame are
not printed.
6
Click the [OK] button to close the trimming dialog box.
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