Once you're comfortable with how the newsletter looks, right-click anywhere on the page where there's a patch of white-space (don't right-click on a text or image, or you'll get a different list of options).
Select View Page Source from the list of options that display, and it'll take you to a page that has all the html you'll need in order to deploy through your email service provider (or ESP for short). CTRL + A will select the entire text, and CTRL + C will copy it to your clipboard so you can paste it into the appropriate field for your ESP to deploy.
