Each radio button in an exclusion group is associated with an On value that represents the selected radio button in the form data. You can change these values, for example, to match existing values in a data source.When you specify On values, the default values are integer values starting with “1” for the first radio button in the exclusion group that was added to the form. If you deselect the Specify Item Values option, the On values will match the radio button caption text.