Because you want the introduction's page numbering to be capitalized Roman numerals, expand the "Page Number" drop-down menu again, but this time, click "Format Page Numbers." ...

Figure D Change the format for the page numbers in the front matter. The title page, page 1, still displays a page number, I, and we want to turn that off.

Change page-number orientation and other header and footer elements when switching between portrait and landscape layouts in Word 2003, 2007, and 2010.

To change the format, click "Insert," "Page Number" and then "Format Page Numbers." You can then choose the Roman numerals option from the Number Format drop-down menu.