updated for version 7.4.393
Problem:    Text drawing on newer MS-Windows systems is suboptimal.  Some
            multi-byte characters are not displayed, even though the same font
            in Notepad can display them. (Srinath Avadhanula)
Solution:   Add the 'renderoptions' option to enable Direct-X drawing. (Taro
            Muraoka)
diff --git a/runtime/doc/various.txt b/runtime/doc/various.txt
index b264e5b..a03a0bd 100644
--- a/runtime/doc/various.txt
+++ b/runtime/doc/various.txt
@@ -337,6 +337,7 @@
 N  *+dialog_con_gui*	Support for |:confirm| with GUI and console dialog.
 N  *+diff*		|vimdiff| and 'diff'
 N  *+digraphs*		|digraphs| *E196*
+m  *+directx*		Win32 GUI only: DirectX and |'renderoptions'|
    *+dnd*		Support for DnD into the "~ register |quote_~|.
 B  *+emacs_tags*	|emacs-tags| files
 N  *+eval*		expression evaluation |eval.txt|