Stacho, we discussed the drawing of cross-sections with MartinB. It looks you should add to therion section-endsection command. Recent method to draw sections is a bit overcomplicated. There is not any relationship between section and section line for example. Sections are not usable for 3D now. section \ -bearing xx \ -slope yy \ -visibility on/off (manual or automatic) \ -anchor (inside passage - the point which belongs to real section) xy \ -reference_point (where to draw section) \ -standard_shape (for visibility off - not drawn on maps, but important for 3D) \ - [data] (in case of nonstandard shape - real section) endsection Therion should draw only "possible" sections - on 2D map only sections connected to subhorizontal not the vertical passages, ... There should be a validity check - if section corresponds to passage dimensions and height symbol for example, bearing too far from perpendicular orientation, ... The section line, orientation mark, connection line, etc. should be generated by therion itself. xtherion should have separate window for editation of real cross-sections and editable library of standard shapes. Any ideas from others? MartinS