Addition from mailist.

diff --git a/Documentation/user/spacing.itely b/Documentation/user/spacing.itely
index 814525184cbbbea419160b650407da64f2d22b5d..708e8d09811487b77916560643110b7d8962e024 100644 (file)
--- a/Documentation/user/spacing.itely
+++ b/Documentation/user/spacing.itely
@@ -286,6 +286,30 @@ result in the first page number remaining as is or being increased by one.
 @end table
 @end quotation
 
+
+@commonprop
+
+The header and footer are created by the functions make-footer and
+make-header, defined in \paper. The default implementations are in
+ly/paper-defaults.ly and ly/titling-init.ly.
+
+The page layout itself is done by two functions in the \paper block,
+page-music-height and page-make-stencil. The former tells the
+line-breaking algorithm how much space can be spent on a page, the
+latter creates the actual page given the system to put on it.
+
+You can define paper block values in Scheme. In that case mm, in, pt,
+and cm are variables defined in paper-defaults.ly with values in
+millimeters. That is why the value 2 cm must be multiplied in the
+example
+
+@example
+\paper @{
+ #(define bottom-margin (* 2 cm))
+@}
+@end example
+
+
 Example:
 
 @example
@@ -297,6 +321,23 @@ Example:
 @}
 @end example
 
+This second example centers page numbers at the bottom of every page. 
+
+@example
+\paper @{
+  print-page-number = ##t
+  print-first-page-number = ##t
+  oddHeaderMarkup = \markup \fill-line @{ " " @}
+  evenHeaderMarkup = \markup \fill-line @{ " " @}
+  oddFooterMarkup = \markup @{ \fill-line @{
+     \bold \fontsize #3 \on-the-fly #print-page-number-check-first
+     \fromproperty #'page:page-number-string @} @}
+  evenFooterMarkup = \markup @{ \fill-line @{
+     \bold \fontsize #3 \on-the-fly #print-page-number-check-first
+     \fromproperty #'page:page-number-string @} @}
+@} 
+@end example
+
 You can also define these values in Scheme.  In that case @code{mm},
 @code{in}, @code{pt}, and @code{cm} are variables defined in
 @file{paper-defaults.ly} with values in millimeters.  That is why the