As can be seen from the previous examples the angle labels have a small superscripted "o" after each label. You can select if you like to show this degree mark or not with a call to the PolarAxis::SetANgleDegreeMark() method by which you can enable or disable that mark after the angels.
For the radius labels all standard formatting that can be done to the X-Y axis such as format string or format callbacks are supported.
A common modification for polar plots is probably to disable the display the last label when using a 360 degree plot since the last label will "collide" with the plot box around the plot area. It is possible to disable the last label with a call to Axis::HideLastTickLabel() As you can see this has been used in some of the examples in this chapter.