\new ChordNames {...} placement

[Menu Jacques]

Hello folks,

In the example below, derived from an example in the LPNR, the:

    \new ChordNames {
      \chordmode {
        c1 d:m
      }
    }

block can be moved outside of the PianoStaff without changing the score’s 
appearance.

Ideally, should such a block belong to the score, a part group, a part or a 
grand staff such as PianoStaff?
The docs are not explicit about that.

Thanks for you help!

JM

—

%%%%%%%%%%%%%%%%%%%%%%%%
\version "2.19.55"

<<
  \new PianoStaff <<

    \new ChordNames {
      \chordmode {
        c1 d:m
      }
    }

    \new Staff {
      \clef "treble_8"
      <c e g c' e'>1^\markup {
        \fret-diagram #"6-x;5-3;4-2;3-o;2-1;1-o;"
      }
      <d a d' f'>1^\markup {
        \fret-diagram #"6-x;5-x;4-o;3-2;2-3;1-1;"
      }
    }

    \new Staff {
      \clef "bass"
      c1
      a1
    }
  >>

>>
%%%%%%%%%%%%%%%%%%%%%%%%