You can use Word's Find and Replace function not only to replace text but also to add to existing text. For example, let's say wherever your document refers to a certain client as Mr. Jefferson, you would like it to read Thomas Jefferson. Follow these steps:

1. Go to Edit | Replace.
2. Type Jefferson in the Find What text box.
3. Type Thomas ^& in the Replace With text box.
4. Click Replace All.

You can also use this function to add text to both the beginning and end of existing text. For example, to change all instances of March 22 to Wednesday, March 22, 2006, you would enter Wednesday, ^&, 2006 in the Replace With Text box.