Canon EOS-1D C Instruction Manual page 272

3 Slide Show (Auto Playback)
To pause the slide show, press <0>. During pause, [G] will be
displayed on the upper left of the image. Press <0> again to resume
the slide show.
During auto playback, you can press the <B> button to change the
still photo display format (p.250).
During movie playback, you can adjust the sound volume by turning the
<6> dial.
During auto playback or pause, you can turn the <5> dial to view
another image.
During auto playback, auto power off will not work.
The display time may vary depending on the image.
To view the slide show on a TV set, see pages 273 and 276.
272
Start the slide show.
4
Turn the <5> dial to select [Start],
then press <0>.
After [Loading image...] is displayed,
the slide show will start.
Quit the slide show.
5
To quit the slide show and return to
the setting screen, press the <M>
button.