Comments Turning on Ghost's comments, deciding who can post, and understanding the styling limits that come from them rendering inside their own frame.
Membership Neutrino's signup and login surfaces — Ghost's built-in pop-up, an optional pair of full-page screens, and the two places the layout changes for a signed-in reader.
Newsletter The footer signup form — what it renders, when it removes itself, and the single setting that controls whether it exists at all.
