To complete the merge, use any of the following methods.
Personalize Individual Letters To personalize individual items, you actually complete the merge, and then edit the information that you want in the resulting merged document. To do this, follow these steps:
Click Edit individual letters.
In the Merge to New Document dialog box, select the records that you want to merge.
Word creates and opens a new merged document. Your main document also remains open, and you can switch back to it if you want to change all the documents.
Scroll to the information that you want to edit, and then make your changes.
Print or save the document just as you would any regular document.