Hi,
I want to use QtDesigner to create a QMainWindow.
But I can't set the centralWidget correctly: I want to have a TabWidget as my centralWidget, but in QtDesigner, it is always a QWidget and I cannot edit it. Simply dragging a QTabWidget onto the QMainWindow adds it as a child of the centralWidget, but I want t to be the centralWidget.
What am I doing wrong?

regards,
Florian