On Thursday 02 August 2007 1:31:16 pm Adam Treat wrote: > + //These are the region of the plot in vector coord > + context.XMin = 0.0; > + context.XMax = 0.1; > + context.YMin = 0.0; > + context.YMax = 0.1; So... you are hard-coding the zoom box to always/only look at curves between (0,0) and (0.1, 0.1)?