Definition Using a Rectangle or Polygon
As already described, the first step in defining a surface area is to select a plane. Once this has been performed, the desired contour of the surface area can be entered in a view or using several views. In 3D views the surface area is shown as a transparent preview. During definition of the surface area you can swap between views. For example, you can set the first point of a rectangle in a 3D view and the second, for greater accuracy, in the 2D plan view.
