Change the shape of a polygon or line by changing its number of vertices.

To add a vertex to a polygon or line:

1. In the Graphics menu, click Edit.
2. Select the polygon or line you want to edit.

   The vertices for that object are selected.

3. Press A.
4. Press on one of the existing vertices and drag outward. A vertex is added counterclockwise to the selected point.

   To add a point clockwise to the selected point, press Ctrl+A.

5. Repeat steps 3 and 4 for each vertex you want to add to the object.

To delete a vertex from a polygon or line:

1. In the Graphics menu, click Edit.
2. Select the polygon or line you want to edit.

   The vertices for that object are selected.

3. Press D.
4. Click the vertex you want to delete.

   The selected vertex is deleted from the object.

5. Repeat steps 3 and 4 for each vertex you want to delete on the object.