Change How Shapes Are Displayed On. It depends on created shapes for data in your shapefile. Select the shape you want to modify.
Look for a yellow diamond on the shape. It depends on created shapes for data in your shapefile. To expand the Shapes window.
Created shapes by ShapefileLayerFactory may be of type surface shapes such as SurfacePlygon or SurfaceCircle.
Edit the XML that defines the shape properties. For this type of shapes if altitude is upper than 0 it will be over images anyway. BTW its good that you would like to make this change for all shapes because thats what will happen when you click OK. Look for a yellow diamond on the shape.