This patch was taken from http://tracker.xemacs.org/XEmacs/its/issue859.
--- xemacs21-21.4.22.orig/man/custom.texi
+++ xemacs21-21.4.22/man/custom.texi
@node Declaring Groups, Declaring Variables, Top, Top
@comment node-name, next, previous, up
-@section Declaring Groups
+@chapter Declaring Groups
Use @code{defgroup} to declare new customization groups.
@node Declaring Variables, Declaring Faces, Declaring Groups, Top
@comment node-name, next, previous, up
-@section Declaring Variables
+@chapter Declaring Variables
Use @code{defcustom} to declare user editable variables.
@node Declaring Faces, Usage for Package Authors, Declaring Variables, Top
@comment node-name, next, previous, up
-@section Declaring Faces
+@chapter Declaring Faces
Faces are declared with @code{defface}.
@node Usage for Package Authors, Utilities, Declaring Faces, Top
@comment node-name, next, previous, up
-@section Usage for Package Authors
+@chapter Usage for Package Authors
The recommended usage for the author of a typical emacs lisp package is
to create one group identifying the package, and make all user options
@node Utilities, The Init File, Usage for Package Authors, Top
@comment node-name, next, previous, up
These utilities can come in handy when adding customization support.
@node The Init File, Wishlist, Utilities, Top
@comment node-name, next, previous, up
Customizations are saved to the file specified by @code{custom-file}, as
calls to @code{custom-set-variables} and @code{custom-set-faces}.
@node Wishlist, , The Init File, Top
@comment node-name, next, previous, up