Canon EOS R50 Mirrorless Camera (White) - Manual (Page 473)

Index Display (Multiple-Image Display)
1.
Switch to the index display.
During image playback, press the < > button.
The 4-image index display will appear. The selected image is
highlighted with an orange frame. Pressing the <
> button again
switches display from 9 images to 36, and then to 100. Pressing the
<
> button switches display from 100 images to 36, 9, 4, and then
single-image display.
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