The Through-Thickness Location section is available in the Settings windows for 
Line Average, 
Surface Average, 
Line Integration, 
Surface Integration, 
Line Maximum, 
Surface Maximum, 
Line Minimum, and 
Surface Minimum nodes under 
Derived Values, when a Layered Material dataset is selected. It is also available for 
Point Evaluation and 
Point Matrix Evaluation nodes when a Layered Material dataset is selected, but the 
Location input list is not available, and the local 
z-coordinate can only be a scalar.
 
    Once Reference surface is selected, the through-thickness location is taken from a layered material definition specified under 
Materials in a 
Layered Material Link or 
Layered Material Stack node, or in a 
Material node that represents a single-layer material.
 
    Enter one or more values for a Local z-coordinate for the 
Physical option or 
Local z-coordinate [-1,1] for the 
Relative option. The bottom, middle, and top through-thickness location of a layered material, having a total thickness 
d, can be defined as follows:
 
    Click the Range button (

) to define a range of local 
z-coordinates using the 
Range dialog box.