To control the appearance of the axes labels on the Radar chart, use the Axis.RadarLabelVisibility property. There are three available options that specify in its corresponding enumeration:
•RadarLabelVisibility.First - the annotation labels appears only on the first radial axis(default).
•RadarLabelVisibility.All - the annotation labels appears only on each radial axis(default).
•RadarLabelVisibility.None – No labels. The property has effect only on radar charts.