[BRLTTY] Help for bindings keys

[MENGUAL Jean-Philippe]

Hi,

In m!st cases, when I discover a braille display, my main problem is 
knowing: what is this key for in brltty or how do I make a feature in 
brltty from this braille keyboard model? I'd like to create a doc, for 
as many displays as possible, to mention how to do some features.
Of course, test is the most trust. But test or not, how is it possible, 
with brltty, to find out help? to know bindings keys for all the 
displays? to have some display description and the feasnves in brltty? 
Well, how bindings of each display are documented?

Regards,