The quickest and easiest way to zoom in and out in a drawing is to use the mouse wheel option. To use this option:
1. Hold the [Shift] key on your keyboard down.
2. Spin the mouse wheel forward to zoom in.
3. Spin the mouse wheel backward to zoom out.
Note:
The location of your mouse cursor will be the center of the zoom activity. Practice holding your mouse in different location as you zoom in and out to learn how you can control the results.