@dfn{subword}. Here are some examples:
@multitable {@samp{NSGraphicsContext}} {@samp{NS}, @samp{Graphics}, and @samp{Context}}
-@headitem Nomenclature
+@c This could be converted to @headitem when we require Texinfo 4.7
+@iftex
+@item @b{Nomenclature}
+ @tab @b{Subwords}
+@end iftex
+@ifnottex
+@item Nomenclature
@tab Subwords
+@item ---------------------------------------------------------
+@end ifnottex
@item @samp{GtkWindow}
@tab @samp{Gtk} and @samp{Window}
@item @samp{EmacsFrameClass}
@findex c-downcase-subword
@findex downcase-subword (c-)
@multitable @columnfractions .20 .40 .40
-@headitem Key @tab Word oriented command @tab Subword oriented command
+@c This could be converted to @headitem when we require Texinfo 4.7
+@iftex
+@item @b{Key} @tab @b{Word oriented command} @tab @b{Subword oriented command}
+@end iftex
+@ifnottex
+@item Key @tab Word oriented command @tab Subword oriented command
+@item ----------------------------------------------------------------------------
+@end ifnottex
@item @kbd{M-f} @tab @code{forward-word} @tab @code{c-forward-subword}
@item @kbd{M-b} @tab @code{backward-word} @tab @code{c-backward-subword}
@item @kbd{M-@@} @tab @code{mark-word} @tab @code{c-mark-subword}