You can resize and reposition two sides or add new sides.

1. Select the polygon editing tool from the tool bar.

2. Click the polygon to select its corners.

3. Click the pointer on one of the corners, and drag to resize the two lines on either side of the corner. You can drag in any direction, even across part of the polygon.

To add a side, position the polygon editing pointer anywhere on one of the sides and drag to create another corner on the polygon. You can add as many new sides as you want.