Canon EOS Rebel SL3 DSLR Camera with 18-55mm Lens (Black) - Manual (Page 387)

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[ Q ] Setting the Paper Size
z Select the size of the paper in the
printer.
[ Y ] Setting the Paper Type
z Select the type of the paper in the
printer.
[ U ] Setting the Page Layout
z Select the page layout.
z If the image’s aspect ratio is different from the printing paper’s aspect ratio,
the image may be cropped significantly when you print it as a borderless print.
Images may also be printed at lower resolution.