Hello Yeray, thank you for the information. I will change the Shape series to a rectangle tool. But there is still the behaviour where the displayed shape depends on the parameter sequence. For me, it is clear now. But maybe other people would save some investigation time if such behaviour is docume...

// This draws a correct shape procedure TForm1.FormCreate(Sender: TObject); begin Series1.Clear; Chart1.LeftAxis.SetMinMax( 0.0, 100.0 ); Chart1.BottomAxis.SetMinMax( 0.0, 100.0 ); Series1.X1 := 60; Series1.Y1 := 50; Series1.X0 := 20; Series1.Y0 := 30; end; // Different sequence , draws an incorrect...