You can insert a high or low elevation point onto a feature line, survey figure, parcel line, or 3D polyline.
This command inserts the break point where two grades intersect. Specify the grade or slope ahead from the start point and back from the end point.
After you select the start and end points, an arrow is displayed at the start of the span. The command line displays the start and end elevations and the distance between the start and end points.
Enter a positive value to grade up or a negative value to grade down.