Canon EOS M Instruction Manual page 235

The total number of images with a given rating that can be displayed is 999.
If there are more than 999 images with a given rating, [###] will be displayed
for that rating.
Taking Advantage of Ratings
With [x2: Image jump with 5], you can display only images and
movies with a specific rating.
With [x2: Slide show], you can play back only images and movies with
a specific rating.
With Digital Photo Professional (provided software, p.340), you can
select only still photos with a specific rating.
With Windows 7 and Windows Vista, you can see each file's rating as With Windows 7 and Windows Vista, you can see each file's rating as With Windows 7 and Windows Vista, you can see each file's rating as
part of the file information display or in the provided image viewer (still part of the file information display or in the provided image viewer (still part of the file information display or in the provided image viewer (still
photos only).
3 Setting Ratings
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