Single colour symbols on Bubble chart

[AWithers]

Crystal Reports 8.5. Can anyone help with a problem I have had with a bubble chart. The chart has over 400 points (and can have potentially more in the future) aad has been built to show patterns of information. In order to avoid confusion as to what different colours on the chart may mean I would like to make all the symbols the same colour.

I understand it is possible to manually set the colour of each data point but obviously, with 400 data points, this is rather labour intensive and also, as there may be additional points in the future, not a total solution

Thanks in anticipation of your help

Andy