The 
option opens an interface for viewing the profile before drawing.
With the movement arrows
, you can check each section before drawing the final result. The lines on the screen represent a cross-section of the loaded surface and its reference surface, compared at the alignment station. In this example, the section shows 100 meters of width (offset=50), every 150 meters (interval=150). It will also have the alignment contour points. The viewer grid's intervals can be set in the grid section.
In the Area section, when one of the volume calculations is checked, the cut/fill area is shown with the selected color. The report's information is calculated based on this polygon.
The 
button is used to view the report containing each of the section's points, their coordinates, their altitude, and their offset relative to the alignment. The report can be saved in text format with options at the bottom of the window.
