Integrating a custom email template with modules

I have read documentation on how to make your own custom email template.

I have read documentation on creating an email using the drag and drop buit-in modules.

But how you you make your own email template and then use the drag and drop built-in modules?

Eg like making the ones in the market place where they are custom templates but use the hubspot HubL to insert the modules wapped in your custom code?

Is there a special HubL tag to use?

Hey @SAU these are two separate tools and processes.

If you create a custom email template, then it is entirely built and edited with HTML code.

Drag and drop templates are provided by HubSpot only.