Hello! I met a problem when image an 2d histogram. Here is part of the codes: ----------------------------------- w0 = window(dimensions=[800,600]) x = raw.v-raw.i y = raw.v upperpart = [0.1,0.1,0.9,0.9] ngrids = 500 bin1 = (max(x)-min(x))/ngrids bin2 = (max(y)-min(y))/ngrids max1 = max(x) min1 = min(x) max2 = max(y) min2 = min(y) h2d = hist_2d(x,y,bin1=bin1,bin2=bin2,max1=max1,min1=min1,max2=max2,min2=min2) h2d = bytscl(alog10(h2d>1))*0.8 ct = colortable(0,/reverse) g0 = image(h2d,rgb_table=ct,axis_style=0,margin=0.1,/current,xrange=[0,ngrids-1],yrange=[ngrids-1,0]) g0.position=upperpart xfoo = findgen(3) yfoo = findgen(3) p2 = plot(xfoo,yfoo,'o',xrange=[min1,max1],yrange=[max2,min2],sym_color='red',nodata=0,/current) p2.position=upperpart ---------------------------------------------- The plot shows properly in the graphic interface and can be saved with .png extension. But when try to save to a .eps or .ps format, the yrange did not work properly, and the image reversed in the up and down direction. It is a little weird. Thank you for look at this post.