GGU-SLAB: "Modify" menu item

After clicking this menu item, the following dialog box appears:

• "Paste layers"
  A new layer can be defined by dividing an existing layer in all constrained modulus profiles. The depth range of the selected layer is divided between 2 new layers. The final depth of the constrained modulus profile thus remains neutral. The soil properties of the selected layer will be adopted for both layers.

• "Delete layers"
  You can select a layer that you want to delete.

• "Raise layers"
  A layer can be selected and raised or lowered by a given amount. This action applies to all constrained modulus profiles.

• "Fixed value"
  A selected layer can be retroactively assigned a given depth in all constrained modulus profiles.