Canon EOS 600D Instruction Manual page 216

3 Slide Show (Auto Playback)
216
3
[ ]
Display time
[ ]
Transition effect
Set [Set up] as desired.
Press the <V> key to select [Set
up], then press <0>.
Set the [Display time] (still photos),
[Repeat], [Transition effect], and
[Background music].
The background music selection
procedure is explained on the next
page.
After selecting the settings, press the
<M> button.
[Background music]
[ ]
Repeat