Help:Radio button

A radio button allows the user to choose only one of a predefined set of options.

Radio buttons are arranged in groups of two or more and displayed on screen as, for example, a list of circular holes that can contain white space (deselected) or a dot (selected). When the user selects a radio button, any previously selected radio button in the same group becomes deselected. Selecting a radio button is done by clicking the mouse on the button.