z menu (for horizontal-plane systems only)

• General note
• "Default depths" menu item
• "Individual depths" menu item
• "Modify (depths)" menu item
• "In section" menu item
• "Layer boundary contours" menu item
• "Layer thickness contours" menu item
• "Section" menu item
• "Interpolation mesh" menu item
• "Nodes" menu item
• "Mesh" menu item
• "Modify" menu item
• "Contours" menu item
• "Import/export" menu item
• "Assign" menu item