[wxPython] wxDesigner question

Hello everybody,

I just got wxDesigner (www.roebling.de) and played around a bit.
It's a very nice program, but I can't see how I can add a control as child to a wxPanel. I can add a wxPanel to my sizer, but I found no way to add for instance a static text as child to this wxPanel.

This also means that I don't know how to add a new sizer to the wxPanel (or any other control). I also didn't find anything appropriate in the examples, so I wonder if anybody here could help me.

Many thanks,

                   Axel