The same happens to me and, I guess, to everybody. Whatever the level values are, the labels are always something like -500,0,500,1000,1500, .... I suspect it's a serious bug in the function. Maybe somebody could fix that? Thank you

Hi there, Please, try the following: mycontour=contour(hanning(80,80),C_VALUE=[0.7,0.8],font_size=8) mycontour.c_label_show=[1,1] In other words, use the C_LABEL_SHOW not inside the call to the CONTOUR function, but after the initialization of that function, ie. in the previous example, the line: mycontour.c_label_show=[1,1] Or in your example it will be: cntr.c_label_show=[1] Cheers, Fernando