IDG Answers is a community of experts who are passionate about technology. Ask a question or answer one below.
You can change it under the Developer tab (if not visible, go to File>Options, then go to Customize Ribbon in the Word Options dialog box and check the Developer box). Select the Attach button; in the Attach Template dialog box you can choose the template you want and open it. Select Automatic Update Document Style and click ok to apply the new template to your doc.