ig grid control, 0 for no grid, 1 for wide grid, 2 for dense grid
/xo 0.1 def /xl 1000 def
/yo 0.002 def /yl 1000 def
%
/inch {72 mul} def
/cm {28 mul} def
%% Use cm as unit
/xs 400 def /ys 400 def
/xf 100 def /yf 100 def
/lgx { } def /lgy { } def
[] 0 setdash