ref: SEARCH ''electromagnetics''--> Paul Abbott --> Tom Marsh notebooks. And under Paul Abbot home page MathSource link--> John Schneider notebooks. Both these sets of notebooks have very interesting graphs, but I can't tell how they were created. I can only see the graph. Format-->Show Expression only gives me some big postscript mess that is no help. it appears the there are some hidden cells with formulas I want to see. I unhide those hidden cells??