From b512137cb2a89c9b5f880fc089221805491c9bdf Mon Sep 17 00:00:00 2001
From: James Lowe <pkx166h@gmail.com>
Date: Sat, 27 Sep 2014 16:26:36 +0100
Subject: [PATCH] Doc: LM 4.1.2 additonal para for positioning grobs
Issue 4137
As reported in
http://lists.gnu.org/archive/html/bug-lilypond/2014-09/msg00025.html
Added paragraph regarding grobs that don't print output
but are used for 'positioning' and 'managing' other
grobs
---
Documentation/learning/tweaks.itely | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/Documentation/learning/tweaks.itely b/Documentation/learning/tweaks.itely
index ac1be581b0..160c0e3901 100644
--- a/Documentation/learning/tweaks.itely
+++ b/Documentation/learning/tweaks.itely
@@ -107,6 +107,14 @@ ending point, and maybe other properties concerned with their
shape. Objects with an extended shape like these are called
@q{Spanners}.
+What is more, there are @q{abstract} grobs which do not print
+anything of their own, but rather collect, position and manage
+other grobs. Common examples for this are
+@code{DynamicLineSpanner}, @code{BreakAlignment},
+@code{NoteColumn}, @code{VerticalAxisGroup},
+@code{NonMusicalPaperColumn} and similar. We will see how some of
+these are used later.
+
It remains to explain what @q{Interfaces} are. Many objects, even
though they are quite different, share common features which need to
be processed in the same way. For example, all grobs have a color, a
--
2.39.5