If your slideshow is very long, chapters can help to structure your slideshow into logical parts. Chapters offer several benefits during authoring and playback, they include:
You can collapse a chapter, to take up less horizontal space and thus a lot less scrolling is required to move around in your slideshow. You can also expand a chapter that you are currently working on, to easily focus on a specific chapter.
To collapse a chapter, click on the small triangle next to the chapter name. If you press the ⌥ key and click on the small triangle all chapters will collapse.
To expand the chapter, click on the small triangle again. If you press the ⌥ key and click on the small triangle all chapters will expand.
To expand or collapse a chapter you could also select
from the menu or , if the selected chapter is collapsed. To collapse or expand all chapters use or from the menu.To move the Playhead from one chapter to the next, press the ⌥ key and the ⊲ or ⊳ arrow key.