When you choose 'automatic', the pop down menus
are displayed without having to press the ENTER
key after positioning the 'light bar' on the
top line.  If you choose 'manual' you must press
the ENTER key to make the menus appear.  You may
also choose whether the menus are to be displayed
with or without shadows.  'No erase' causes menus
to stay on the screen after another one appears.
