How to allow only one radio button selected when multiple radio buttons are presented to the user

To make only one radio button checked in some multiple radio buttons, you have to make all of them have the same radio button name and make sure the options Radio buttons with the same name and value are selected in unison is unchecked under Options tab in Radio button Properties dialog boxes for all of those radio buttons.To open Radio button Properties window, please click on Form tab in Foxit PDF Editor,choose Radio button, double click on a radio button PDF file to bring up Radio Button Properties window that belongs to the button you have clicked.