You can change left, right, top, or bottom margins in a document by using the Page Setup dialog box in Microsoft Word 97/2000. You can also use the Page Setup dialog box to set "mirror" margins so that inside and outside margins are the same width on the front and back of a double-sided page, and to set "gutter" margins on a bound document to add extra space to the side or top margin so that text isn't obscured by the binding.
To change margins
To set inside and outside margins on a double-sided document, select the Mirror margins check box in the Page Setup dialog box, and then enter values in the Inside and Outside boxes.
To set a gutter margin, enter a value in the Gutter box in the Page Setup dialog box. Word automatically inserts the gutter margin between the two pages on a double-sided document. For a single-sided document, click Left or Top under Gutter position.