Place the insertion point in the first paragraph of your numbered list. On the Format menu, click Bullets and Numbering. Click the Customize button. In the Customize Numbered List dialog box, change the indentation as required. For a description of the options for indentation, see the relevant portion of the article at
http://www.shaunakelly.com/word/numb...ering2003.html (note that most of the article is specific to outline, or multilevel, numbering).