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Paste the code to your Cornerstone website’s HTML field.
Next, go to your Cornerstone website editor and find the HTML field. It is most likely in the form of an HTML/Code widget or module which you can find on the Cornerstone’s editor. Add it to your page, and paste the PDF Flipbook Embed Code you’ve copied before to the HTML field.
Save and update, and that’s it, you should have Common Ninja’s PDF Flipbook extension on your Cornerstone website.