How can I increase the distance between grouped staves

[Karsten Reincke]

Dear Friends;

and (hopefully) a last question before I can gove something (hopefully) useful 
to
the community:

How can I increase the distance between grouped staves (meaning: the distance
after the automatically computed linebreak ?)

Unfortunately, I do not exactly understand what of the notation reference refers
to what.

Many thanks for your help
Karsten 
-- 
  Karsten Reincke    /\/\   (+49|0) 170 / 927 78 57
 Im Braungeröll 31   >oo<  mailto:k.rein...@fodina.de
60431 Frankfurt a.M.  \/    http://www.fodina.de/kr/