Changing to a Dashed Line
1. Click on the Inspector 
button, then click on the Stroke 
button.
2. Click on the Dashed Line listing to change to a dashed line.
3. Click on any dash pattern to change the line dash pattern.
See Also:
Adding an Arrow
1. Click on the Inspector button, then click on the Stroke button.
2. Click on the Dashed Line listing to change to a dashed line.
3. Click on any dash pattern to change the line dash pattern.