> Dear all, how could I be able to define new sybol in NVIZ ? (now is > diamond ... avialbe) It is pretty easy. see: http://grass.gdf-hannover.de/twiki/bin/view/GRASS/GrassProgrammingHowto#Display_Symbols or lib/symbol/README in the source code. look in $GISBASE/etc/symbol/ for examples. Hamish