Doc: remove void item.

[lilypond.git] / Documentation / notation / keyboards.itely

diff --git a/Documentation/notation/keyboards.itely b/Documentation/notation/keyboards.itely
index c93abe76b0b7a2141b2478537090f4d31ae03d00..bcd955b28e20a5df6e9375e61aaed82195d4cb5c 100644 (file)
--- a/Documentation/notation/keyboards.itely
+++ b/Documentation/notation/keyboards.itely
@@ -7,7 +7,7 @@
     Guide, node Updating translation committishes..
 @end ignore
 
-@c \version "2.13.36"
+@c \version "2.14.0"
 
 @node Keyboard and other multi-staff instruments
 @section Keyboard and other multi-staff instruments
@@ -110,7 +110,7 @@ as shown in @rlearning{Other uses for tweaks}.
 @end itemize
 
 @c @snippets
-@c @lilypondfile[verbatim,lilyquote,texidoc,doctitle]
+@c @lilypondfile[verbatim,quote,texidoc,doctitle]
 @c {forcing-visibility-of-systems-with-multi-bar-rests-when-using-\RemoveEmptyStaffContext.ly}
 @c http://lsr.dsi.unimi.it/LSR/Item?u=1&id=312
 
@@ -195,6 +195,39 @@ center of the staff that is closest to the beam.  For a simple
 example of beam tweaking, see @rlearning{Fixing overlapping
 notation}.
 
+@cindex cross-staff collisions
+@cindex collisions, cross-staff voices
+
+Overlapping notation can result when voices cross staves:
+
+@lilypond[verbatim,quote]
+\new PianoStaff <<
+  \new Staff = "up" {
+    \voiceOne
+    % Make space for fingering in the cross-staff voice
+    \once\override DynamicLineSpanner #'staff-padding = #3.4
+    e''2\p\< d''\> s1*0\!
+  }
+  \new Staff = "down" <<
+    {
+      \clef bass
+      s4. e,8\rest g,2\rest
+    } \\ {
+      c8\( g c'
+      \change Staff = "up"
+      e' g' b'-3 a' g'\)
+    }
+  >>
+>>
+@end lilypond
+
+The stem and slur overlap the intervening line of dynamics
+because automatic collision resolution is suspended for beams, slurs
+and other spanners that connect notes on different staves,
+as well as for stems and articulations if their placement is
+affected by a cross-staff spanner.
+The resulting collisions must be resolved manually, where necessary,
+using the methods in @rlearning{Fixing overlapping notation}.
 
 @seealso
 Learning Manual:
@@ -212,6 +245,10 @@ Internals Reference:
 @rinternals{Beam},
 @rinternals{ContextChange}.
 
+@knownissues
+Beam collision avoidance does not work for automatic beams that end
+right before a change in staff.  In this case use manual beams.
+
 
 @node Changing staff automatically
 @unnumberedsubsubsec Changing staff automatically
@@ -400,7 +437,7 @@ Chords that cross staves may be produced:
         % extend the stems to reach the other staff
         \override Stem #'length = #12
         % do not print extra flags
-        \override Stem #'flag-style = #'no-flag
+        \override Flag #'style = #'no-flag
         % prevent beaming as needed
         a8 g4 f8 f bes\noBeam g4
       }
@@ -414,7 +451,7 @@ Chords that cross staves may be produced:
 @end lilypond
 
 @snippets
-@lilypondfile[verbatim,lilyquote,texidoc,doctitle]
+@lilypondfile[verbatim,quote,texidoc,doctitle]
 {indicating-cross-staff-chords-with-arpeggio-bracket.ly}
 
 
@@ -560,7 +597,7 @@ come into use to simplify the performance instructions.
 
 @snippets
 
-@lilypondfile[verbatim,lilyquote,texidoc,doctitle]
+@lilypondfile[verbatim,quote,texidoc,doctitle]
 {accordion-discant-symbols.ly}