\version "2.13.41"


%%%% 1st example: \override in a non-Staff context applies to the first Staff
%                 of the score!
musicI = \relative c' { \clef "treble" c4 dis }
musicII = \relative c { \override Staff.Accidental #'color = #red dis4 \override Voice.Accidental #'color = #blue es }
\score { <<
  \new Staff \new Voice \musicI
  \new Staff \new Voice \musicI
  \new Staff \new Voice \musicII
  % BUG: The \override Staff.... inside the NoteNames changes the very first 
  %      staff of the score!!!
  \new NoteNames \musicII
>>}



%%% 2nd example: \override for a FiguredBass grob in a non-FiguredBass context
%                applies to the FiguredBass context in parallel to the Staff
\score { <<
    % This override will be applied to the FiguredBass that appears later:
    \new Staff \new Voice \relative c' { c4 \override FiguredBass.BassFigure #'color = #green d }
    \new Staff \new Voice \relative c' { c4 d }
    \new FiguredBass \figuremode { <8 3>4 <5> <7 2> }
>>
}


%%% 3rd example: You can change the settings of a PianoStaff from a completely 
%%%% different staff that is not inside a PianoStaff!
\score { <<
    \new Staff \new Voice \relative c' { c1 \break 
      %% The following \set should never apply to the PianoStaff that follows the current staff!
      \set PianoStaff.shortInstrumentName = #"Dummy" d1 
    }
    \new PianoStaff <<
      \new Staff \relative c' { f1 g }
      \new Staff \relative c { \clef "bass" f1 g }
    >>
  >>
}