Group Slides
You can create groups of Slides in the slide navigator by indenting them up to six levels deep. Grouping doesn’t affect how a presentation plays, and it can help you organize and arrange Slides more efficiently. You can move grouped Slides as a set and collapse groups for a better view of your presentation’s organization.
Group Slides
To ungroup Slides, select one or more grouped Slides, then drag them to the left until they’re no longer indented.