### Grade and direction - **Bank grade** sets the terrace slope and therefore affects the speed of water flowing down each terrace. - **Direction** sets whether terraces flow left, right, or both left and right from the start line. To make them flow towards the start line, change the bank grade to a negative value, for example from 0.2% to -0.2%. ### Spacing and individual terraces - **Spacing** sets the basis for terrace starting positions: Vertical distance is the elevation drop; Horizontal distance is the distance travelled along the start line. - Use **Add Terrace** at the lower right of the design pane to add a terrace. Each addition updates the **Next** distance on the right. - The centre list shows every added terrace and how far it extends. Use this list to change a terrace's start distance or delete it. ### Smoothing and stop lines The **Smoothness** slider reduces surface irregularities. Increase it if terrace lines are too jagged. However, higher smoothing makes terraces follow the **Bank grade** less closely; this can cause wet spots and/or require earth moving to ensure drainage. **Add Stop Line** places a black line on the map with large red circles at both ends. Move the red circles to position one or more stop lines where terrace lines should end, such as at a waterway.