GGU-UPLIFT: "Top of system" menu item
Using this menu item you can activate absolute elevations (e.g. m AD). Activate the check box and enter the new height for top of system (= excavation base). The designation for the absolute elevation, which you enter before, is shown in the soil properties legend as the depth dimension.
Once you have confirmed your input you will next be presented with a query on how to deal with the existing elevation data for soil strata and groundwater. If you leave the elevations at the same level (= check boxes activated), the originally entered data will not be modified.
The check boxes are deactivated by default. Check the preferences and confirm your input. You will then see a message box, which compares the old and new data for you. If you used any of the previous check boxes mistakenly, you can repeat the process correctly by clicking "Cancel" in the message box. By exiting the dialog box using "OK" the new elevation data are entered into the system data.