used.}
\end{twocollist}
+\wxheading{GTK}
+
+\twocolwidtha{7cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{{\bf Option}}{{\bf Value}}
+\twocolitem{gtk.tlw.can-set-transparent}{\helpref{wxTopLevelWindow::CanSetTransparent()}{wxtoplevelwindowcansettransparent}
+method normally tries to detect automatically whether transparency for top
+level windows is currently supported, however this may sometimes fail and this
+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}
\twocolwidtha{7cm}