How can I edit a chart?
To edit a chart you need to go to the charts library, which could be found by following route: Visualizer > Chart Library
Once you open the library, you will be able to find a chart what you need. When you find a chart, click on Edit icon.
After you click on "Edit" button, the editor popup will appear. This popup wizard will walk you through all screens of general chart creation process, but this time instead of creation chart you will edit it. After you select chart type (or leave it as it is), upload data (or skip it) and adjust chart options, click on "Save Chart" button in the right bottom corner of the popup.