Option box
An option box contains two or more optionbuttons. Optionbuttons are used to
select mutually exlusive options. An optionbutton is (depending on the OS)
shown as a raised rectangular area. It contains a raised diamond on the left.
When an option is selected, this diamond is colored. You can select one
of several options by clicking on them with the mouse. The currently
selected option will consequently be deslected. On the right side of
the radiobuttons there is a short text describing the option.