Hi Silly question maybe, but I am only a novice. How do I make the background of contourplot white? I have tried bg, canvas, and all other possible option suggested under par and xyplot. But nothing seems to work. Since my plot is of data in x-y space maybe I could use another function (i.e. contour), but than x and y should be ordered and I haven't figured out how to do that yet. Any suggestions? Willem -- Dr R.W. Vervoort McCaughey Senior Lecturer Hydrology and Catchment Management Faculty of Agriculture, Food and Natural Resources Rm 503, Watt Bldg. http://www.agric.usyd.edu.au/mccaughey Postal: Bldg A03 The University of Sydney, NSW, 2006 phone: +61 (2) 9351 8744 fax: +61 (2) 9351 5108 e-mail: w.vervoort at acss.usyd.edu.au