GGU-SLICE: Multi-layer system
For a multi-layer system you will see the following dialog box for defining the system geometry using the same group boxes "System" and "Partial factor" as for single layer systems.

Only the soil properties are defined in the multi-layer system-specific "Edit/Soils" menu item. If you are using the partial safety factor concept, you can also enter the partial safety factor for the shear coefficients in the dialog box.