The extended image extends past the content of the page or post. By default, the text on a page only stretches part of the way off the page. That way, it makes paragraphs of text easier to read, and images stand out. After all, a picture is worth 1000 words.
A full width image breaks out of the box. It can be created by adding a full-width slideshow to your page or post, and only adding a single slide.
A parallax image stays fixed to the background, and the page content scrolls around it. Perfect for a big reveal. The user is rewarded for scrolling and interacting with your site, and they can see a full-screen image – a piece at a time.
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Nullam venenatis volutpat lectus sed pulvinar.Aliquam erat volutpat. Suspendisse magna arcu, placerat id vestibulum a, laoreet vitae ipsum. Ut ornare pellentesque viverra. Quisque fringilla neque id nisi malesuada,sed lobortis lectus viverra. Donec dictum lectus vel nisl accumsan, fermentum euismod mi dictum.
This is just a regular old image that fits to the content area.