Find and replace paragraph styles
If you combine material from several sources, you may discover that lots of unwanted paragraph styles have suddenly shown up in your document. To quickly change all the paragraphs of one (unwanted) style to another (preferred) style:
On the expanded Find & Replace dialog box (Figure 49), select Search for Styles. (If you have attributes specified, this checkbox is labeled Including Styles.) The Search for and Replace with boxes now contain a list of styles.
Select the styles you want to search for and replace.
Click Find, Find All, Replace, or Replace All.