Change Diagram Type in Control Chart in QE51N

Hi

I'm using the QE51N to record the results.

I press the Control Chart Button and it's OK.

I change the Diagram Type from "Lines" to "XY" (Dispersion), but the change isn't keep it for the other characteristics, or if another day I execute the QE51N the Diagram type remains like "Lines"

Is it possible to change the diagram type and keep it forever? I have used the "Save Mode" button but doesn't work.

Thanks a lot for the answe.I will give the points.

Take care,

Francisco