The "Assign" frame contains a list of layers of profile and associated soils. The list of soils is graphically represented using buttons in the bar above the table, or is accessible from a combo list for each layer of the profile.
The procedure to assign soil into a layer is described in detail herein.
In subsequent stages of construction the program automatically adds a new layer, to which a soil adjacent to terrain is automatically assigned. In many cases (excavation pits) this layer may have no volume - its introduction is necessary providing the new terrain is found above the terrain of the previous stage. The soil is always assigned, since it is not possible to a prior estimate, whether some part of the terrain in the new stage will be located above the original one.