BubbleScale Property
Returns or sets a scale factor for all bubble series on the specified chart. The default value is 100, and the valid range is 0–300. The value of this property indicates the bubble size relative to the default setting. Setting the BubbleScale property to 300 (three times greater than the default value) produces a chart on which the bubbles appear three times the default size. Read/write Double.
expression.BubbleScale
expression Required. An expression that returns a ChChart object.
Example
This example sets the bubble scale factor for the specified chart in the chart workspace. Note that Charts(0) must refer to a bubble chart.
ChartSpace1.Charts(0).BubbleScale = 200