Write to the buffers of displays in a certain zone,sub-zone. The update of the display is is not done right away but is instead done when the Show Buffer event is received by the display unit. 

 | Byte | Description                                                               | 
 | :----: | -----------                                                               | 
 | 0    | index - Increase by one for each event sent for specific text to display. | 
 | 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.        | 
 | 3-7  | Display data.                                                             | 

Index is increased by one for each event that builds up a specific event. If needed an empty (no data) can be sent as the last event else sending data to fill the display buffer will give the end automatically.

Many LCD displays allow definition of special characters. Use this event to define custom matrices buy defining a sub-zone for the user defined matrix(es). 
