Heights arrangement along a profile

For arrangement of heights along a profile it is necessary to have two "known" horizontals at the bottom and on the gradient top (quantity of "unknowns" horizontals arranged on selected gradient between "known" one should be coordinated with a contour interval indicated in the sheet passport).

For arrangement of heights it is necessary to select the first of "known" objects, to indicate a point - beginning of a profile on it, then to select the second object and to indicate a point - end of a profile on it.

The profile should be selected so that it intersected each of "unknowns" horizontals only once.