Slide shows use two types of navigation: Automated or Manual.
Use Automated navigation for unattended presentations so you can set up the presentation and leave it to run unattended. When the slide show reaches the last slide it automatically returns to the first slide and starts again.
To use the automated navigation, open the slide show in you browser and click the Play button. The variables control the transition from item to item, and slide to slide. To stop the slide show click the Stop button.
Use Manual navigation when you present to an audience and need to control the slide progress, ensuring your slides display at the correct time.
To use the manual navigation, open the slide show in your browser, but instead of using the Play button, use the keyboard or mouse navigation to start the presentation.