This is for controlling screen format of a display device 

 | Data byte | Description                                                        | 
 | :---------: | -----------                                                        | 
 | 0         | 0 = Auto, 1 = Just, 2 = Norma,l 3 = Zoom.                          | 
 | 1         | Zone for which event applies to (0-255). 255 is all zones.         | 
 | 2         | Sub-zone for which event applies to (0-255). 255 is all sub-zones. | 
