Canon EOS R5 C VR Creator Kit with RF 5.2mm f/2.8 Dual Fisheye Lens - Manual (Page 626)

Manual Reset
For resetting file numbering to 0001 or starting from 0001 in new
folders
When you reset the file numbering manually, a new folder is created automatically and the
file numbering of images saved to that folder starts from 0001.
This is useful, for example, if you want to use different folders for the images taken
yesterday and the ones taken today.
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