In Word page layout can affect how content looks in documents. When using Word paper size and page margins can be easily changed.
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.
Word has a variety of predefined margin sizes to choose from.
Word also allows you to customize the size of your margins in the Page Setup dialog box.