[BRLTTY] define chars to have multiple cell dots

[Lee Maschmeyer]

What we really need to do is find a way to divorce
contracted/non-contracted from 8/6 dots, hopefully without needing to
add a new keystroke to every display.

How about this: If you press the "6-dot" key once it toggles between
8-dot computer braille and contracted braille. If you press it twice
quickly it goes to 6-dot computer braille. If you're in 6-dot computer
braille, either one or two presses goes to 8-dot computer braille.

Would that work? Is the keystroke in question amenable to being
pressed twice quickly on most displays?

-- 

Lee Maschmeyer

"Never imagine yourself not to be otherwise than what it might appear
to others that what you were or might have been was not otherwise than
what you had been would have appeared to them to be otherwise."
     --Lewis Carroll