3.12.2.Change the Margin Using the Mouse in Page Layout View
Click the View tab. Click the Page Layout View button.
Select the Ruler check box.
Position the cursor over the left, right, top, or bottom edge of the ruler until the cursor changes to a double arrow.
A ScreenTip appears indicating the margin name and current position.
Drag to change the margin.
To exit Page Layout view, click the Normal button.