Bubble chart display

[Arun]

How do I get one bubble to move in front of the other? There seems to be no
relationship between the order they are listed and the order the appear on
the chart.

 

[Andy Pope]

The order is set by the point position.

So for the following data set of X,Y,Size data you should see a set of
concentric bubbles. Where the last point with a size of 1 is on top.
Change the last points size to 5 to cover all subsequent points.
X Y Size
1 1 5
1 1 4
1 1 3
1 1 2
1 1 1

If you have more than 1 series the 2nd series is plotted over the 1st.

And finally any series on the secondary axis will be plotted above those
on the primary axis.

Cheers
Andy