Is it possible to add a button below the NOTES or beside PROCEED TO PAYMENT BUTTON which links to a page called ‘Tour’?
Unfortunately, there’s no such feature, it would require a custom implementation. If customizations are required for your site, please try customizing it using the collection of code snippets https://gist.github.com/search?q=user%3Ahivepress and other developer resources, or consider hiring someone for custom work https://fvrr.co/32e7LvY
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