VIEWSONIC VS12835 - Manual (Page 22)

Enjoy Life, Enjoy ViewSonic
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2. While in full screen mode, press Play/Pause/Stop button again to start
slide show. To stop the slide show playback, press Pause and then
Escape button.
3. In full screen viewing mode, press button to enter a sub-menu.
Photo sub-menu options: interval, transition effects, sequence, image
information, and set wallpaper.
ViewSonic VPD400/VPD500