Add index entries for polymetric signatures.

diff --git a/Documentation/user/advanced-notation.itely b/Documentation/user/advanced-notation.itely
index 2c14fd82282979f640439b2fe8aca13c5a1d2793..2e4463ba15911f80904e23040f9ac58a78f6bfba 100644 (file)
--- a/Documentation/user/advanced-notation.itely
+++ b/Documentation/user/advanced-notation.itely
@@ -1702,6 +1702,11 @@ see those sections of the documentation.
 @node Polymetric notation
 @subsection Polymetric notation
 
+@cindex double time signatures
+@cindex signatures, polymetric
+@cindex polymetric signatures
+@cindex meter, polymetric
+
 Double time signatures are not supported explicitly, but they can be
 faked.  In the next example, the markup for the time signature is
 created with a markup text.  This markup text is inserted in the