The interface incorporates an on line HELP facility. A
comprehensive description of the functions of each button in the
interface is obtained by clicking the right-hand mouse button
over an interface button. A window appears with the description. The
window remains on the screen when the mouse button is released and
can be updated with a new message. Try for example to click with the
right-hand mouse button on 
in the Main window,
then with the same mouse button on 
.