LDISPLAY HELP

'?' - print help
'q' - quit
' ' - gets the spectra of the closest lenslet and displays it
'c' - just adds the flux up between two defined points
'l' - take two points to determine background to take off,
        then add up the intervening flux. Useful for irregular lines
'r' - ratio of two lines. Performs 'l' twice, takes the ratio
        of first values to the second.
'i' - distance of lenslet from centre of array in arcsecs.
'd' - distance between two selected lenslets