Canon IXUS 990IS - Manual (Page 108)

. Viewing Slideshows
108
Changing Settings
You can change the time that slideshow images are displayed, transition
effects and set the slideshow to repeat. You can select from seven transition
effects when switching between images.
Select [Slideshow].
● Press the
n button and select the 1
tab, then select [Slideshow] and press the
m button.
Make the setting.
● Press the
op buttons or turn the  dial
to select an item, then press the qr
buttons to adjust the setting.
● If you select [Start] and press the
m
button, the slideshow starts with your
settings.
● Pressing the
n button restores the
slideshow screen.