what are document margins?
Page margins. A margin is the space between the text and the edge of your document. By default, a new document's margins are set to Normal, which means it has a one-inch space between the text and each edge. Depending on your needs, Word allows you to change your document's margin size. To format page margins: Word has a variety of predefined margin sizes to choose from. Select the Page Layout tab, then click the Margins command.