+@node The \paper block
+@subsection The @code{\paper} block
+
+The @code{\paper} block can appear within a @code{\book} block,
+but not within a @code{\score} block. Settings in a @code{\paper}
+block apply to the entire book, which may include multiple scores.
+Settings that can appear in a @code{\paper} block include:
+
+@itemize
+
+@item
+the @code{set-paper-size} scheme function,
+
+@item
+@code{\paper} variables used for customizing page layout, and
+
+@item
+markup definitions used for customizing the layout of headers,
+footers, and titles.
+
+@end itemize
+
+The @code{set-paper-size} function is discussed in the next
+section, @ref{Paper size and automatic scaling}. The
+@code{\paper} variables that deal with page layout are discussed
+in later sections. The markup definitions that deal with headers,
+footers, and titles are discussed in
+@ref{Custom headers footers and titles}.
+
+Most @code{\paper} variables will only work in a @code{\paper}
+block. The few that will also work in a @code{\layout} block are
+listed in @ref{The \layout block}.
+
+Except when specified otherwise, all @code{\paper} variables that
+correspond to distances on the page are measured in millimeters,
+unless a different unit is specified by the user. For example,
+the following declaration sets @code{top-margin} to ten
+millimeters:
+
+@example
+\paper @{
+ top-margin = 10
+@}
+@end example
+
+To set it to @code{0.5} inches, use the @code{\in} unit suffix:
+
+@example
+\paper @{
+ top-margin = 0.5\in
+@}
+@end example
+
+The available unit suffixes are @code{\mm}, @code{\cm},
+@code{\in}, and @code{\pt}. These units are simple values for
+converting from millimeters; they are defined in
+@file{ly/paper-defaults-init.ly}. For the sake of clarity, when
+using millimeters, the @code{\mm} is typically included in the
+code, even though it is not technically necessary.
+
+It is also possible to define @code{\paper} values using Scheme.
+The Scheme equivalent of the above example is:
+
+@example
+\paper @{
+ #(define top-margin (* 0.5 in))
+@}
+@end example
+
+@seealso
+Notation Reference:
+@ref{Paper size and automatic scaling},
+@ref{Custom headers footers and titles},
+@ref{The \layout block}.
+
+Installed Files:
+@file{ly/paper-defaults-init.ly}.
+
+
+@node Paper size and automatic scaling
+@subsection Paper size and automatic scaling