Hello, I try to change the symbols for my survey (small survey), and I follow the wiki to increas symbol numbers for area blocks, pebbles and debris. http://therion.speleo.sk/wiki/doku.php?id=mmj It work find for blocks and pebbles area, but the changes for debris seams to not been taken in account. I past my code for a_debris in the a_blocks definition, the symbols are well drawn (on blocks areas). So the code is good I thing. Here the code. def a_debris (expr p) = T:=identity; % thclean p; pickup PenB; path q; q = bbox p; picture tmp_pic; tmp_pic := image( for i = xpart llcorner q step 0.3u until xpart urcorner q: for j = ypart llcorner q step 0.3u until ypart urcorner q: draw ((-.15u,0)--(.15u,0)) rotated uniformdeviate(360) shifted ((i,j) randomized 0.3u) withpen PenA; endfor; endfor; ); clip tmp_pic to p; draw tmp_pic; enddef; Do you have the same problem ? may be I have to add othe command lines ? I use the windows release 5.2.7. Thanks, Gilbert