The Utilities> Elevation of Entities command allows the conversion of a flat cartography, with 2D entities, to a 3D cartography, in order to prepare it to obtain profiles, or obtain a surface.

Multiple mode allows you to raise multiple contour lines at the same time. The program initially asks for the separation in elevation between successive curves, with their sign. Then two points are entered, so that the line between them intersects with several contour lines, and finally the initial elevation is keyed in. With these data, the program assigns the initial elevation to the first curve, and successively increases the elevation with the specified spacing, assigning it to the next contour line.