requirements of the frame opacity code (OS X)

diff --git a/etc/NEWS b/etc/NEWS
index 900125699a53a995d80a41c323b078ed5c68132f..d4122c7661926a15b455d4e301d321d3910b78a9 100644 (file)
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -146,8 +146,8 @@ 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, or on
-Windows 2000 and later versions of Windows.
+the X Window System, such as Compiz, Beryl and Compiz Fusion, on Mac
+OS X, 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