Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 476)

RAW Image Processing
Magnified View
RAW Image Processing Options
You can process or images with the camera to create JPEG or HEIF images.
RAW images are not affected, so different conditions can be applied to create JPEG or HEIF
images.
You can also use Digital Photo Professional (EOS software) to process RAW images.
Caution
Processing into HEIF is not available for or images captured with
multiple exposure, expanded ISO speed (L or H), or electronic shutter selected.
1.
Select [ : RAW image processing].
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