On the View tab, select the checkbox next to Ruler.
Each drawing window has vertical and horizontal rulers that show measurements at the scale of the drawing.
The intervals of the ruler correspond to the measurement units you set in the Page Properties tab in the Page Setup dialog box.
The units that appear on the ruler and the location of the zero point, or starting point, for both rulers are set in the Ruler & Grid dialog box. For more information about ruler settings, see Change the ruler measurement units.
When you move shapes in a drawing, faint lines appear on the rulers to indicate the position of the shapes.