Switches to outline view where you can reorder slides and edit slide titles and headings.
The Text Formatting bar contains the following icons for slide titles:Promote, Demote, Move Up and Move Down. If you want to reorder slide titles with the keyboard, ensure that the cursor is at the beginning of a title and press Tab to move the title one level lower in the hierarchy. To move the title up one level, press Shift+Tab.
The upper outline level corresponds to slide titles, and the lower levels correspond to the headings on a slides.