I tried some code to implement a pie chart, and it works fine. Now I just want to add a white spacing (separator line) between each slice for a better look and feel, but can't find out a way to do this. Please notice the attached picture which is downloaded from the Downloads tab, there are white lines separate all slices one by one, what property should be the correct one?

You can use the borderLineStyle property of CPPieChart. This sets the line style used to outline every slice.

Thanks, I downloaded the lastest version of CPPieChart, then the borderLineStyle is there.