+These are the classes relevant to the sizer-based layout.
+
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{wxSizer}{wxsizer}}{Abstract base class}
+\twocolitem{\helpref{wxBoxSizer}{wxboxsizer}}{A sizer for laying out windows in a row or column}
+\twocolitem{\helpref{wxStaticBoxSizer}{wxstaticboxsizer}}{Same as wxBoxSizer, but with surrounding static box}
+\end{twocollist}
+
+\overview{Overview}{constraintsoverview} over the constraints-based layout.
+
+These are the classes relevant to constraints-based window layout.