Pick the surface(s) in a modeling window.
Pick the shader in the Multi-lister.
See Assign Shader in Render > Multi-lister .
Select Shading > Assign Shader in the Multi-lister.
Pick the surface(s) in the modeling window.
Pick the shader in the Multi-lister that you want to layer another shader on top of.
See Assign Shader in Render > Multi-lister .
Select Shading > Assign Shader in the Multi-lister.
Pick the shader in the Multi-lister that you want to be layered on top of the first shader.
See Layer Shaders in Render > Multi-lister .
Select Shading > Layer Shaders in the Multi-lister.