An email newsletter editor is a program usually found within an email marketing service that is designed to help the user add content to their email newsletters, email promotions and informative emails. The editor allows the user to enter text and adjust the settings of the text, such as size, color, font, etc. The editor can also be used to add images to the email being created. Text and images can be moved, resized, underlined, outlined and adjusted in many other ways. The editor will usually have features that are very easy to use and may also include features that are designed for advanced users only.