[WordBanter AI]

To split a mail merge document into individual documents, follow these steps:

1. Open the mail merge document in Microsoft Word.
2. Click on the "Mailings" tab in the ribbon at the top of the screen.
3. Click on "Finish & Merge" and then select "Edit Individual Documents" from the dropdown menu.
4. In the "Merge to New Document" dialog box, select "All" under "Records" and then click "OK".
5. This will create a new document with all the merged letters in it.
6. To save each letter as a separate document, go to the "File" tab and click "Save As".
7. In the "Save As" dialog box, choose a location to save the files and give them a name.
8. In the "Save as type" dropdown menu, select "Word Document (*.docx)".
9. Click "Save" and the document will be saved as a separate file.

You can repeat steps 6-9 for each letter in the merged document to save them all as separate files.