Orca orca and contracted braille

Hello all,
Is it possible to display grade2 braille with orca? Under the text console, I can see grade2 braille, but 
when I start 
orca, I only see grade1, and switching to brltty's preferences menu doesn't work, since after a few seconds 
the pref 
menu goes away and the current application comes back.  I wondered if there was some braille driver parm that 
I could 
pass to brlapi, but looking at the source code for braille.c in the brlapi subdir of brltty's brailledrivers 
it doesn't look like brlapi accespts parameters for a contraction table.  Is there something else I can do?
Thanks in advance,

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