advToolPanelTab - two panels one column


In my application I make use of the advToolPanelTab tab with two ToolPanels on it. When both panels are locked I would like to show them  stacked in one column instead of two columns (similar as the default Delphi IDE does with tool windows) . How can I accomplish this?

Thanks in advance!

Sorry, there is no built-in feature to display this stacked, it is always displayed using columns (when toolpaneltab position is left or right.