Open resource editor?

What is the “open resource editor” next to template inputs? Is it just intended to be a bigger space to edit the template?

The title of the popup is “Edit inline code” … which seems to imply javascript? but perhaps is just meant to imply HTML?

An explanation would be awesome! Thanks.

The resource editor simply is a larger canvas on which to document the contents of template fields.  You no longer have to code a full URL with lots of query strings and merge syntax within a limited text input field.  (Yay) There are limits to what you can put in an template field - so I don’t think Javascript is allowed.  

So yeah…  More Banzai features to make your life easier.  Features to many to adequately publicize…