Change the shape of a line, freeform shape, or scribble
On the map, select the drawing 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, then click Add Point.
To delete a point from a shape or scribble, right-click the point, then click Delete Point.