Font size of pie chart data labels in Crystal 8.0

Where can I change the font size for the data labels of the pie chart in Crystal 8.0?

I inherited a number of reports where data labels are in two font sizes: very small, barely visible, and large.

We need to change them to some reasonable font size, but we only see the option to change title/subtitle/footnote/legend font and nothing for the data labels.

I also looked thru the only user manual available - 8.5 - and it did not mention font size for data labels either, or I missed that.

Thank you!