- The location of the zero (0) on the horizontal or vertical ruler.
- The point in the drawing window where the zero points of each ruler intersect. By default, the zero point is the lower-left corner of the drawing page.
The degree of magnification of a drawing in the drawing window. A zoom of 100% displays the drawing at the same size it will be when it is printed, unless you reduce or enlarge the printed output on the Print Setup tab in the Page Setup dialog box.