Location: 01 General : 3 Drawing Tools.
To use in conjunction with grade cutting with SEOs. A U- shaped white stripe which masks the bottom and sides of the mesh in the section. The right end height is the height of the object, and the left-end height is set with an editing hotspot.
Place it using the 'box' (third) geometry method. Draw the box from the lower left corner of the grade to the upper right corner. Then use the arrow tool to stretch the left side height.
Naturally, the red line doesn't print.