environment determination. Supported values are \texttt{GNOME} and \texttt{KDE}.}
\twocolitem{gtk.window.force-background-colour}{If 1, the backgrounds of windows with the wxBG\_STYLE\_COLOUR background style are cleared forcibly instead
of relying on the underlying GTK+ window colour. This works around a display problem when running applications under KDE with the gtk-qt theme installed (0.6 and below).}
-\twocolitem{gtk.desktopmargin.x}{The horizontal margin to subtract from the desktop size when Xinerama is not available.}
-\twocolitem{gtk.desktopmargin.y}{The vertical margin to subtract from the desktop size when Xinerama is not available.}
\end{twocollist}
\wxheading{Mac}