Can I use custom HTML templates in the Drag and Drop editor?
While you can import a custom HTML template to have drag-and-drop functionality, we only recommend using custom HTML for technically savvy marketers or for anyone who has access to a developer. While our product does support custom HTML, our support team is unable to help you build out your custom templates beyond offering the general guidance covered in our documentation. We also cannot guarantee that your custom HTML template will be fully compatible or look exactly the same with our drag-and-drop editor. For more information check out our article on Import a Custom HTML Template with Drag and Drop Support