To customize an oval or rectangle annotation’s appearance:

Choose Tools > Text Tool.

Double-click the shape.

If the Inspector isn’t already open, choose Tools > Inspector.

Click Attributes.
You can change the appearance of an oval or rectangle annotation, including its color, the thickness of its lines, and whether it has dashed or solid lines.
Choose Tools > Text Tool.
Double-click the shape.
If the Inspector isn’t already open, choose Tools > Inspector.
Click Attributes.