This is only available with the edge point feature.
The Measure Order list in the Measurement Properties area allows you to choose the order in which the sample points will be taken before the final hit is taken. The choices are: Surface, Edge, or Both.
Surface
Measures the three hits, first on the surface, then on the edge.
Edge
Measures the two hits, first on the edge then the surface.
Both
Measures the surface, then the edge, and then the surface again.