Hello, I tried to make a .xvi for elevation and extended section starting from this dataset: survey test centerline units compass degrees units clino degrees units tape metres data normal from to length compass clino left right up down 0 1 10 45 -67 [1 2] [3 4] [5 6] [7 8] endcenterline endsurvey everything looks good, the up and down data are plotted in the right way. Then I changed the clino to -68 degrees and noticed that vertical sections were rotated in the elevation and extended xvi. Is that correct? Am I missing something? Here's the thconfig: encoding utf-8 source dati.th export map -proj plan -o pianta.xvi export map -proj extended -o sezione.xvi export map -proj elevation -o elevazione.xvi Thanks, Marco