You can format and customize a radar chart in Excel by doing the following:
a. Double-click on chart elements to open the formatting options. b. Use the "Chart Elements" button on the chart to add or remove elements like data labels, gridlines, or legend. c. Right-click on various chart elements to format them. d. Change the chart type, axis labels, titles, and other properties as needed. e. Adjust the scale of the radar chart.