Found the settings... turning AF Mode off/on did not make any difference... After a few minutes of playing around I managed to make the box go away... This is probably not the correct way but for now (at least inside not flying) it works.... I turned EVERYTHING ON... AF Mode, AF Assistant, MF Assistant!!! The screen comes up with no box and I fired off a few pictures and a video... all is good.. no green box. BUT, it you touch the screen the green box rears its ugly head, and stays. Then you have to unswitch everything and then switch everything back on. So with AF Mode on, AF Assistant and MF Assistant on.... as long as you don't touch the screen the green box stays asleep.
I'm hoping others will express their experiences.... Bye for now !!!