release: 1.3.121

[lilypond.git] / scm / interface-description.scm

diff --git a/scm/interface-description.scm b/scm/interface-description.scm
index 9b0d034e514fc0fc9ac67a892e02c2a2265d3aa4..e6a034a0606b977bbb5eb280a0bd622a64f94c38 100644 (file)
--- a/scm/interface-description.scm
+++ b/scm/interface-description.scm
@@ -305,8 +305,34 @@ object."
 (define time-signature-interface
   (lily-interface
    'time-signature-interface
-   "A time signature, in different styles"
-   '( fraction style )))
+   "A time signature, in different styles.
+  The following values for 'style are are recognized:
+
+    @table @samp
+      @item @code{C}
+        4/4 and 2/2 are typeset as C and struck C, respectively.  All
+        other time signatures are written with two digits.
+
+      @item @code{old}
+        2/2, 3/2, 2/4, 3/4, 4/4, 6/4, 9/4, 4/8, 6/8 and 9/8 are
+        typeset with old-style mensuration marks.  All other time
+        signatures are written with two digits.
+
+      @item @code{1xxx}
+        All time signatures are typeset with a single
+        digit, e.g. 3/2 is written as 3. (Any symbol starting
+       with the digit @code{1} will do.)
+
+      @item @code{C}@var{M}@code{/}@var{N}, 
+@code{old}@var{M}@code{/}@var{N} or
+      @code{old6/8alt}
+        Tells LilyPond to use a specific symbol as time signature, 
+       regardless of the actual time signature.
+    @end table
+
+See also the test-file @file{input/test/time.ly}.
+"
+   '(fraction style )))
 
 (define bar-line-interface
   (lily-interface
@@ -746,7 +772,7 @@ direction = Forced direction for all ties"
 (define span-bar-interface
   (lily-interface
    'span-bar-interface
-   ""
+   "A bar line that spans other barlines (typically used to get cross-staff barlines."
    '(
     )))