Interesting - are you picturing editing sample data when you are previewing a graph?
For example, on this page https://www.blockspring.com/graph_templates/60 and the preview modals, you could toy with the sample data so you get a better understanding of how the graph works?
For example, on this page https://www.blockspring.com/graph_templates/60 and the preview modals, you could toy with the sample data so you get a better understanding of how the graph works?