Adding, Deleting, and Moving the Editing Points on a Shape
You can fine-tune the lines and contours of a shape by adding, moving, or deleting 
its editing points. First you need to make the shape editable, as described in “Editing 
Shapes” on page 203. 
Here are ways to manipulate a shape’s editing points:
To add a point, make the shape editable, press the Option key, and then hold the 
m
pointer over the shape’s border. The pointer changes into a pen tip with a plus sign (+). 
Click the location on the border where you want to add a point, and then move the 
point if needed. 
To move a point, make the shape editable, click the point, and then drag it to another 
m
location. You can move several points at the same time by holding down the Shift key 
as you click multiple points and then dragging.
To delete a point, make the shape editable, click the point, and then press the Delete 
m
key. You can delete several points at the same time by holding down the Shift key as 
you click multiple points and then pressing Delete.