more space than on Windows, then the initial size of a dialog using a
sizer will automatically be bigger on Mac than on Windows.", "
+Sizers may also be used to control the layout of custom drawn items on
+the window. The `Add`, `Insert`, and `Prepend` functions return a
+pointer to the newly added `wx.SizerItem`. Just add empty space of the
+desired size and attributes, and then use the `wx.SizerItem.GetRect`
+method to determine where the drawing operations should take place.
+
:note: If you wish to create a custom sizer class in wxPython you
should derive the class from `wx.PySizer` in order to get
Python-aware capabilities for the various virtual methods.