If necessary, you can reduce the number of table of contents levels. For example, a table of contents that has four levels can be converted to a two-level table of contents. To do this, delete the fourth and third levels of the table of contents.
Table of contents levels can be deleted starting from the last level in the list.
To add the last level of table of contents, follow these steps:
1.Open the Edit table of contents window in one of the following ways:
•Left-click the table of contents and on the Home tab, in the Contents group, click
Edit.
•Right-click the table of contents and run the Edit table of contents command from the context menu.
2.In the Edit table of contents window, click
Delete level to the right of the given level.
3.To close the Edit table of contents window, click outside the window or click the
button in its title bar.