Commit 920ab46c authored by Seiji Zenitani's avatar Seiji Zenitani

requirements of the frame opacity code (OS X)

parent c786a929
......@@ -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
......
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