Yes, this can be done by calling the TeeChart routine TeeSaveBoolOption inside the TeeEditCha unit. Calling this routine with the TeeMsg_TreeMode key and a true value will globally set the editor to tree mode inside and out of the report designer.
Download: TeeChartTreeModeEditor.zip
Sample Delphi code:
uses TeeEditCha, EditChar; procedure TForm1.Button1Click(Sender: TObject); begin // set global option for displaying the chart editor // this will be used by ReportBuilder as well TeeSaveBoolOption(TeeMsg_TreeMode, True); EditChart(nil, Chart1); //ppReport1.Print; end;