Custom headings in a document.
In the first lesson you learned how to customize the look of your automatic TOC entries. Suppose you've inherited a document that uses Word's predefined Heading 1, Heading 2, and Heading 3 styles as well as custom-styled headings.
Fortunately, building a TOC that includes both kinds of headings, predefined and custom, is not hard. In fact, it takes just a couple of clicks.