Canon EOS 90D DSLR Camera with 18-135mm Lens - Manual (Page 442)

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Connecting to a Printer via Wi-Fi
Cropping the Image
Set cropping immediately before
printing.
Changing other print settings after
you crop images may require you to crop
the images again.
1 On the print setting screen, select [Cropping].
2 Set the cropping frame size, position, and aspect ratio.

The image area within the cropping frame will be printed. The shape
of the frame (aspect ratio) can be changed with [Paper settings] .
Changing the Cropping Frame Size
Turn the <
v
> <
r
> dial to change the cropping frame size.
Moving the Cropping Frame
Use <
j
> <
9
> to move the frame vertically or horizontally.
Switching the Orientation of the Cropping Frame
Pressing the <
B
> button will toggle the cropping frame between the
vertical and horizontal orientations.
3 Press < 0 > to exit the cropping.

You can check the cropped image area on the upper left of the print
setting screen.