When editing the structure of a compound wall, use the Assign Layers tool to assign a row in the Edit Assembly dialog to a layer or region in the preview pane. The layer then assumes the number, material, and function specified for the row.
It is more useful to assign layers to regions vertically, rather than horizontally. For example, you might split finish layer 1 into several regions. Then you could assign another finish row to some of those regions and create an alternating pattern, such as brick over concrete.
Before performing this procedure, open the Edit Assembly dialog for the wall type. See Access Tools for Vertically Compound Walls.
To assign wall layers
All regions currently assigned to that row are highlighted in the preview pane. Add a layer to assign a material to an adjacent region.