What’s the difference between ‘save to test mode’, ‘preview’, and ‘publish’?

‘Save to Test Mode’ allows you to save a draft of a template without publishing it live in your system. Once saved, other users will see your template draft. ‘Publish’ publishes the template live in your system. ‘Preview’ generates a PDF that will show what the response will look like when it is sent to the reviewer.

You must "Publish" a template in order to begin responding to disputes with it.