To move a nested manager, click and drag in the background
of the nested manager. You can start a multiple selection with a selection
rectangle in one of these ways:
Click and drag in the background of
the view
Click and drag in the background of
a nested manager with the Control (Ctrl) key pressed.
In this case the Control key distinguishes between the
beginning of dragging a selection rectangle and the beginning of a
move operation on a manager.