I cannot seem to find code to default an email section/content block to be a snippet by default.
It's not possible to do this currently. We're working on a ton of enhancements and you may see this at some point in the near future!
Hi JD,
I don't think this is possible, as you have to define which snippet you want to use in your email, not just that the section is a snippet type section. The editor needs to know which snippet within your design studio you want placed there, and that has to be done through the drag and drop editor.
John