I recently created an email that we would like to clone to a template so that sales staff can use it in SFDC Sales Insights. Is there a way to do this, or do I need to fully recreate the email as a template?
An option would be to copy the HTML from the e-mail you want to clone into a template.
Open up the e-mail you want to copy in the editor. Click E-mail Actions -> HTML Tools -> Replace HTML. Copy the HTML code in the text box that pops up (don't edit/delete it or you will lose your formatting!)
Next, create a new Template e-mail in Design Studio. Click the HTML Source tab and replace what's currently there with the HTML you copied from the e-mail you wanted to clone. That should give you an exact copy that you can now keep as your new template.