To Andrew, Billy, Ansley and ferret users. With regard to finding maxs and mins on a plot "Bullseye" does the trick and, as Billy says, the maxs, mins can be put on as labels. Although not a priority, a qualifier for the CONTOUR command to include maxs and mins would still be most useful as a refinement. Thanks for your help. Mark -- Mark Williams Regional Director (Victoria) Phone 09 9669 4968