A: Yes. There are two ways that you can do this. One is to save the diagram boundaries by going to the Diagram Properties window (RHS toolbar> Edit Diagram Properties) and clicking on Save Bounds to preserve diagram boundaries in the diagram metadata. The other way is to manually edit the values in the diagram’s xml file. This is done by changing the values of the line in bold below:

<GeochemFunctionAxisX name=”testa” function=”A” log=”false”/>

   <GeochemFunctionAxisY name=”testb” function=”C” log=”true”/>

   <Bounds x=”0.001″ y=”0.001″ w=”13.0″ h=”750.0″ />

If you define the boundaries by changing the values in the bold line, then the diagram extents will be preserved from then on.