Thank you, Pallav for your response. However, in reading all the documentation I can find about this, I am still puzzled as to why the images are displaying so differently. I have changed the scale but not the size of the underlying linear chart. You can see that your sample begins with 0. But, mine ranges from -200 to +200. But changing the scale and changing the size are two different things if I understand correctly. If I must change the scale of the pixel based object, how and where do I do that in the XML to make it scale correctly with the underlying object that is scaled as shown but whose size is no different than the one in your documentation example? I have played with and changed every setting I can see in the data.xml file. Must I also change something in the html to reflect the changed scaling?
Paul