Canon EOS REBEL T7I Wi-Fi (Wireless Communication) Function Instruction Manual page 90

Print Settings
Q Setting the Paper Size
Y Setting the Paper Type
U Setting the Page Layout
Prints with no borders. If your printer cannot print borderless
Borderless
prints, the print will have borders.
Bordered Prints with white borders along the edges.
xx-up Option to print 2, 4, 8, 9, 16, 20, or 35 images on one sheet.
The page layout varies depending on the printer model or its
Default
settings.
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. If the image is cropped, the print may look grainier due to the fewer
number of pixels.
90
Select the size of the paper loaded in

the printer, then press <0>.

The paper type screen will appear.
Select the type of the paper loaded in

the printer, then press <0>.

The page layout screen will appear.
Select the page layout, then press

<0>.

The print setting screen will reappear.