As you build or reorganize presentation content, you may need to move upper-level headings so that they become subheadings, which is called demoting, and move lower-level headings up to become higher-level topics, which is called You can promote and demote text by using the Ribbon or the mouse.
Promote and Demote Items
1 Click the Home tab.
2 Click the Outline tab, if needed.
3 Click anywhere in a heading.
4 Click the Decrease List Level ().
The heading moves down one level in the outline hierarchy.
5 Click anywhere ...