This feature is located in the Section menu.
If you click insert table of contents, a new slide will be inserted after the current one. It will present every items currently in your presentation (either slides, sections or subsections, depending on your template), and it can latter be updated by clicking update table of contents.
- If the contents of the presentation do not fit on a single slide, additional slides will be created.
- Clicking insert table of contents when it has already been inserted, you simply activate it.