To display radio button properties in the Property inspector, select a radio button in a form. See also Adding an object to a form.
RadioButton Assigns a name to the button. All radio buttons in a group must have the same name.
Checked Value Sets the value of the radio button when it is turned on. This is the value that is sent to the processing application (for example, a CGI script) when the user submits the form. Assign different values to each radio button in a group.
Initial State Determines whether the button is turned on or off when the form first loads. Only one button in a group can have an initial state of On.