Enhancing Images > Using the Tool Box Toolbar > Using the Painting Tools
Use the Copy Polygon tool to copy a rectangular area and move it to a different area of an image.
To use this tool:
Click .
Position the cursor over the image and click at each corner of the polygon.
To finish the shape, double-click the end point of the line or shape.
Position the cursor in the middle of the shape and click and drag the shape to a new position.
Click outside the shape. The change to the image is now permanent.