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<a name="Grid-lines"></a>
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<h5 class="unnumberedsubsubsec">Grid lines</h5>
<p><a name="index-grid-lines-1641"></a><a name="index-lines_002c-grid-1642"></a><a name="index-vertical-lines-between-staves-1643"></a><a name="index-lines_002c-vertical-between-staves-1644"></a><a name="index-Grid_005fpoint_005fengraver-1645"></a><a name="index-Grid_005fpoint_005fengraver-1646"></a>
<a name="index-Grid_005fline_005fspan_005fengraver-1647"></a><a name="index-Grid_005fline_005fspan_005fengraver-1648"></a>
<a name="index-gridInterval-1649"></a><a name="index-gridInterval-1650"></a>
<p>Vertical lines can be drawn between staves synchronized with the
notes.
<p>The <code>Grid_point_engraver</code> must be used to create the end
points of the lines, while the <code>Grid_line_span_engraver</code> must
be used to actually draw the lines. By default this centers grid
lines horizontally below and to the left side of each note head.
Grid lines extend from the middle lines of each staff. The
<code>gridInterval</code> must specify the duration between the grid
lines.
<blockquote>
<pre class="verbatim">
\layout {
\context {
\Staff
\consists "Grid_point_engraver"
gridInterval = #(ly:make-moment 1 4)
}
\context {
\Score
\consists "Grid_line_span_engraver"
}
}
\score {
\new ChoirStaff <<
\new Staff \relative c'' {
\stemUp
c4. d8 e8 f g4
}
\new Staff \relative c {
\clef bass
\stemDown
c4 g' f e
}
>>
}
</pre>
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</blockquote>
<p class="noindent">
<h5 class="subsubheading">Selected Snippets</h5>
<p><em>Grid lines: changing their appearance</em>
<p>The appearance of grid lines can be changed by overriding some of their
properties.
<blockquote>
<pre class="verbatim">
\layout {
\context {
\Staff
% set up grids
\consists "Grid_point_engraver"
% set the grid interval to one quarter note
gridInterval = #(ly:make-moment 1 4)
}
}
\new Score \with {
\consists "Grid_line_span_engraver"
% this moves them to the right half a staff space
\override NoteColumn #'X-offset = #-0.5
}
\new ChoirStaff <<
\new Staff {
\relative c'' {
\stemUp
c'4. d8 e8 f g4
}
}
\new Staff {
\relative c {
% this moves them up one staff space from the default position
\override Score.GridLine #'extra-offset = #'(0.0 . 1.0)
\stemDown
\clef bass
\once \override Score.GridLine #'thickness = #5.0
c4
\once \override Score.GridLine #'thickness = #1.0
g'
\once \override Score.GridLine #'thickness = #3.0
f
\once \override Score.GridLine #'thickness = #5.0
e
}
}
>>
</pre>
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<p class="noindent">
<h5 class="subsubheading">See also</h5>
<p class="indent">
<p>Snippets:
<a href="../../../input/lsr/lilypond-snippets/Editorial-annotations.html#Editorial-annotations">Editorial annotations</a>.
<p>Internals Reference:
<a name="index-Grid_005fline_005fspan_005fengraver-1651"></a><a href="../lilypond-internals/Grid_005fline_005fspan_005fengraver.html#Grid_005fline_005fspan_005fengraver">Grid_line_span_engraver</a>,
<a name="index-Grid_005fpoint_005fengraver-1652"></a><a href="../lilypond-internals/Grid_005fpoint_005fengraver.html#Grid_005fpoint_005fengraver">Grid_point_engraver</a>,
<a name="index-GridLine-1653"></a><a href="../lilypond-internals/GridLine.html#GridLine">GridLine</a>,
<a name="index-GridPoint-1654"></a><a href="../lilypond-internals/GridPoint.html#GridPoint">GridPoint</a>,
<a name="index-grid_002dline_002dinterface-1655"></a><a href="../lilypond-internals/grid_002dline_002dinterface.html#grid_002dline_002dinterface">grid-line-interface</a>,
<a name="index-grid_002dpoint_002dinterface-1656"></a><a href="../lilypond-internals/grid_002dpoint_002dinterface.html#grid_002dpoint_002dinterface">grid-point-interface</a>.
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