Canon EOS 100D Instruction Manual page 249

The total number of images with a given rating that can be displayed is up to
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 w/6], you can display only images with a
specific rating.
With [x2: Slide show], you can play back only images with a specific
rating.
With Digital Photo Professional (provided software, p.365), you can
select only images with a specific rating (still photos only).
With Windows 8.1, Windows 8, or Windows 7 etc., you can see each
file's rating as part of the file information display or in the provided image
viewer (still photos only).
3 Setting Ratings
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