1. The category Axis label displays the category values in chart.

2. In Formatting Property click on Category Axis Property.

3. Enter Following details in Category Labels:
Label Placement: On Ticks
Toggle Label Inside

The toggle button is enabled by default that’s why it shows disabled Labels in below figure.

Label Placement: It has Two options Between Ticks and on ticks If user select Between tick, it shows the labels between two ticks: If user select on tick, it shows the labels on the ticks:

Label Distance: controls the distance between the labels in chart, user can put positive and negative values in it as per requirements.

Label Inside: It displays the label position inside the chart, by default it is outside the chart.

Label Inverse: To make label position inverse, the label inverse property is used. Category labels will shift in inverse position in chart.

4. Fill above details in edit box, As Shown in figure below:

5. Click on Preview and Save and Exit.

6. Now, match your Radar chart with the below example, it should look like the figure below: