Selecting Height
When a building component is added to a drawing, its default position is the floor base
      height, i.e. the level of the floor surface (z-coordinate is 0). If you wish to position the
      component at another height, you can change its height by using the  Select Height function
      in the auxiliary menu. Select the new locating height in the dialog box.
 Select Height function
      in the auxiliary menu. Select the new locating height in the dialog box.
 Select Height with 3D Levels Dialog
        Box
      Select Height with 3D Levels Dialog
        Box
You can also use the function to display the opaque property of a covering component in a 2D drawing. The overlapping components have different Z coordinate values (Z>0). The component with the greater Z coordinate covers the component with the smaller Z coordinate.
