So ...

Open your post in the editor, place your cursor in the exact place where you want to add the chart, click the "Add Media" button and select the new "Visualizations" tab from the left side menu. As a result, all your existing charts will be displayed:

Now hover your mouse over the targeted chart and click the "Insert" button. The plugin will insert the shortcode in your content:

Finally, click the "Update" button.

And here's the live result in my case:

And there is more ... As I said, you can update or edit your existing charts any time you want. All you have to do, is to edit your source TXT file and upload it again into the same chart under Media => Visualizer Library. Also, you can easily display your charts in the sidebar (or any other widget area) by simply inserting the shortcode in a simple text widget.

Cool isn't it?

And that's it my friends!

If you have any comments, further questions or update requests please don't hesitate to react! Like, comment and share!

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Thanks for your time!