GGU-STRATIG: "Surface line" menu item
A horizontal surface line can be displayed to the right and left of the stratigraphic logs and wells, mainly to optically enhance the drawing. In this menu item, you can determine whether or not a surface line should be displayed and the width of the line.

In addition to these straight auxiliary lines, it is also possible to utilise the integrated Mini-CAD system's line-drawing function, allowing you to draw surface lines, grass lines, slope lines and much more (see "Mini-CAD" manual).