A polygon is a closed shape with straight edges. You can create polygon shapes on any layer. For example you might create a polygon shape to create a ground plane

alt To draw a polygon shape:
  1. On the left toolbar choose the Polygon tool.
  2. Choose the desired layer.
  3. Click at several locations along the shape.
  4. When finished, right-click.
alt To remove a node:
  1. Select the shape.
  2. Double-click the node to be removed.
alt To modify a polygon:
  1. Select the shape.
  2. Drag a node handle to reshape.