Canon EOS R5 C VR Creator Kit with RF 5.2mm f/2.8 Dual Fisheye Lens - Manual (Page 434)

Resizing JPEG/HEIF Images
You can resize a JPEG or HEIF image to reduce the pixel count and save it as a new image.
Resizing is available for , , or JPEGs or HEIFs (sizes except
), including those
captured in RAW+JPEG and RAW+HEIF shooting. images and RAW images cannot be
resized. Images recorded in VIDEO mode cannot be resized.
1.
Select [ : Resize].
2.
Select an image.
Turn the < > dial to select the image to resize.
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