The top, front, and side views of the model each have a pair of rulers (see p. 14) that show the coordinates of the model. If the numbers to be displayed on these rulers become too large or too small, numbers might not be displayed with enough precision. The Ruler Format dialog box can be used to change the number of digits displayed on the rulers. To display the Ruler Format dialog box, either double-click on a ruler or select Customize|Ruler Format… To change the precision of a particular ruler, change to the tab for that ruler and change the precision in the edit box. To see what effect this will have, type a number in the "Sample Number" edit box and see how it is displayed in the preview area.