\section{\class{wxSizer}}\label{wxsizer}
wxSizer is the abstract base class used for laying out subwindows in a window. You
-cannot use wxSizer directly; instead, you will have to use \helpref{wxBoxSizer}{wxboxsizer},
-\helpref{wxStaticBoxSizer}{wxstaticboxsizer} or \helpref{wxNotebookSizer}{wxnotebooksizer}.
+cannot use wxSizer directly; instead, you will have to use one of the sizer
+classes derived from it. Currently there are \helpref{wxBoxSizer}{wxboxsizer},
+\helpref{wxStaticBoxSizer}{wxstaticboxsizer},
+\helpref{wxNotebookSizer}{wxnotebooksizer}, \helpref{wxGridSizer}{wxgridsizer}
+and \helpref{wxFlexGridSizer}{wxflexgridsizer}.
The layout algorithm used by sizers in wxWindows is closely related to layout
in other GUI toolkits, such as Java's AWT, the GTK toolkit or the Qt toolkit. It is