How to add and remove lines and points, how to raise or lower and simply surface in civil 3d L#13

In this video explained that how we can add and remove lines from surface How we can add remove and modify points of surface How we can raise and lower the surface How to minimize flat edges in surface in civil 3d How to smooth the surface in civil 3d ~-~~-~~~-~~-~ Please watch: "How to plot GPS Coordinates from excel to Google earth"    • How to plot GPS Coordinates from excel to ...   ~-~~-~~~-~~-~