This is a rubber sheet stretched over a 3D bar graph. It is not commonly used in ProVal. Nonetheless, because it shows relationships between large amounts of data that otherwise would be difficult to see, this graph type can be used for finding the best combination of two sets of data.

2D Surface: Colors are assigned depending upon the height (Y-axis value) of each point in the graph.
3D Surface Graphs: This is the same as 2D, but displayed in 3D mode.3D is activated on the 3D View Tab of Graph (or Chart) Properties.

Surface graphs support Zoom In and Rotation capabilities.