Mac - Keynote ('08 and '09)


  1. Open your file.
  2. Click on "Inspector"
    Screen_shot_2010-01-20_at_12.14.50_PM.png
  3. Click on the "Document Inspector" icon
    Screen_shot_2010-01-20_at_12.14.59_PM.png
  4. Click on the list and select "Self-Playing"
    Screen_shot_2010-01-20_at_12.15.21_PM.png
  5. Set the transition delay to 15 seconds
    Screen_shot_2010-01-20_at_12.15.37_PM.png
  6. Save your document
  7. You're all set! Just press play, and it will advance to the next slide ever 15 seconds!