Function keys F11 and F12 are available as shortcut keys for
activation of important sucros selected by the user.
The functions (names of sucros) are given by `sucro_key' lines
in the SURVO.APU file as follows:
                                        alternative key
  sucro_key1=<sucro for F11>            Ctrl-A
  sucro_key2=<sucro for F12>            Ctrl-B
  sucro_key3=<sucro for shift-F11> 
  sucro_key4=<sucro for shift-F12>      Ctrl-D
  sucro_key5=<sucro for ctrl-F11>       Ctrl-E
  sucro_key6=<sucro for ctrl-F12>       Ctrl-F
  sucro_key7=<sucro for alt-F11>        Ctrl-G
  sucro_key8=<sucro for alt-F12> 
For example, one possible selection could be:
  sucro_key1=V            / Show the current menu of Survo jobs
  sucro_key2=SURVO-START  / Show the main menu of Survo
  sucro_key3=SURVO-SETUP  / Show the menu of system parameters setting
The easiest way to see the current list of sucro keys and to maintain it
is to use the /SURVO-SETUP sucro (which also should have a place
in that list; see the preceding example).