Canon EOS R6 Mark II Mirrorless Camera with 24-105mm f/4-7.1 Lens - Manual (Page 607)

Rotating Still Photos
You can use this feature to rotate the displayed image to the desired orientation.
1.
Select [ : Rotate stills].
2.
Select an image to rotate.
Turn the < > dial to select the image.
3.
Rotate the image.
Each time you press the < > button, the image is rotated clockwise
as follows: 90° → 270° → 0°.
To rotate another image, repeat steps 2 and 3.
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