Canon EOS R5C Manual page 441

3.
Select an image.
Turn the <
press the <
To select another image to convert, repeat step 3.
Press the <
4.
Save.
Select [OK] to save the JPEG image.
If there are other images for conversion, select [Yes].
> dial to select a HEIF image to convert to JPEG, then
> button.
> button to convert to JPEG.
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