Posting the border relative to the page margin and change the margin setting to the page:
1. On the file menu, click page setup.
2. Click the margins tab.
3. Increases the bottom margin to at least 0.67 inch, and then click ok.
4. On the format menu, click borders and shading.
5. Click the page border tab, and then click options.
6. In the measure from list, click text, and then click ok twice.