Canon EOS REBEL EOS T5 1200D Instruction Manual page 314

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 (EOS software, p.318), you can select
only images with a specific rating (still photos only).
With Windows 8, Windows 7, or Windows Vista, 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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