Add Windows support note to alpha frame parameter.

diff --git a/etc/NEWS b/etc/NEWS
index a3ae75bf3007bb76adf9873a7c04628ae8b98536..40cb6cee33b44040c9725cfd097698246a15bbed 100644 (file)
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -109,7 +109,8 @@ for details about XEmbed.
 *** Emacs can now set the frame opacity.
 The opacity of a frame can be controlled by setting the `alpha' frame
 parameter.  This only takes effect on a compositing window manager for
-the X Window System, such as Compiz, Beryl and Compiz Fusion.
+the X Window System, such as Compiz, Beryl and Compiz Fusion, or on
+Windows 2000 and later versions of Windows.
 
 The alpha parameter should be an integer between 0 (transparent) and
 100 (opaque), or a float number between 0.0 and 1.0.  It can also be a