If you want to copy any object you have drawn on your map i.e. make another exact copy, you can clone it.
1.Select the object you want to clone by clicking it.
You will see sizing handles around the object.
2.Right-click the object and select Clone from the menu that appears.
An exact replica of your object will appear on you map. You will need to move it.
See also
Moving, sizing and rotating objects
Changing an object's colours and styles
To select an overlapping object