Bubble Charts, Displaying darkend gridline through (0,0)

Jul 8, 2010 at 12:16 AM

I am using bubble series charts and am centering the chart area to (0,0) (by setting equal and opposite values to min and max values of x and y linear axis). Now I need to darken the X-Axis and Y-Axis (passing through (0,0)). Currently, when we set gridlines visibilty to true, we get many lines at equal intervals, I need to darken or highlight the ones passing through the center of chart (0,0). Any suggestions on how to proceed?