The dialog is displayed by clicking View in the Strata Manager.

It lists all the boreholes used in the creation of the stated stratum, the top or base surface can be tuned by including or excluding individual location data.

• Top: Toggled On indicates the location is being used to create the stratum Top surface. By toggling off, the surface is updated without using the data from the hole location.
• Base: Toggled Off indicates the location is not being used to create the stratum Base surface. By toggling On, the surface is updated with the data from the hole location.