The Layered Material Link subnode (

) is used for referencing a 
Layered Material from a 
Layered Material Stack node. You can add any number of 
Layered Material Link subnodes under a 
Layered Material Stack node.
 
    By clicking the Go to Material (

) button you can jump to the settings for the selected material.
 
    Click the Add Layered Material button (

) to add another 
Layered Material or a 
Switch. The added material then becomes the one selected in the 
Material list.
 
    From the Transform list, choose one of the following options:
 
    Select the Scale check box to scale the layered material’s thickness with a factor (default: 1). The scale can be a numerical value, a parameter, or an expression. Such an expression can, for example, be a function of the coordinates so that a surface with variable thickness can be described.
 
    Click the Layer Cross Section Preview button (

 to plot a preview of the layer cross section including the transform. You can also click the downward pointing arrow to choose 
Layer Cross Section Preview (

) or 
Create Layer Cross Section Preview (

), which adds the preview plot as a new plot group under 
Results. Click the 
Layer Stack Preview button (

) to get a preview of the stack with the transform. Click the 
Create Layer Stack Plot button (

) to add the preview of the stack with the transform as a new plot group under 
Results.