You can customize some X-related aspects of Emacs behavior using X
resources, as is usual for programs that use X. On MS-Windows, you
can customize some of the same aspects using the system registry.
-@xref{MS-Windows Registry}. Likewise, Emacs on MacOS Carbon emulates X
-resources using the Preferences system. @xref{Mac Environment Variables}.
+@xref{MS-Windows Registry}.
- When Emacs is built using an ``X toolkit'', such as Lucid or
+o When Emacs is built using an ``X toolkit'', such as Lucid or
LessTif, you need to use X resources to customize the appearance of
the widgets, including the menu-bar, scroll-bar, and dialog boxes.
This is because the libraries that implement these don't provide for