option allows to override the automatic detection. Setting it to $1$ makes the
transparency be always available (setting it can still fail, of course) and
setting it to $0$ makes it always unavailable.}
+\twocolitem{gtk.desktop}{This option can be set to override the default desktop
+environment determination. Supported values are \texttt{GNOME} and \texttt{KDE}.}
\end{twocollist}
\wxheading{Mac}