Change the shape of a line, freeform shape, or scribble
On the map, select the drawing that you want to change by clicking its border.
Do one of the following:
To change the shape of your drawing, drag a segment or sizing handle.
To add a point to your drawing, right-click the shape at the place where you want to add a point, and then click Add point.
To delete a point from a shape or scribble, right-click the point, and then click Delete point.