Select some of the text that you want to add.
On the Home tab, in the Styles group, click the More button and then click Save Selection as a New Quick Style.
Give your new style a name–for example, TOCBody.
Now, on the References tab, click Table of Contents, and then click Insert Table of Contents.
In the dialog box that opens, scroll down until you see the new style that you just created, and then assign it a level.
For example, if your table of contents will show level 1, level 2, and level 3 headings, type 4 for the level of your new style.
Now, select the text that you want to appear in the table of contents, and then in the Styles group, click your style.
If you’ve already inserted a table of contents, you can click Yes to update your table of contents. Or you can click Insert Table of Contents to insert a new one.