Image
This content block allows you to use an entire page to focus viewers on a single image. Playlist authors should use this page when they want people to closely inspect an image or perhaps view a diagram.
An Image content page looks like this:

This is how the authoring form for Image looks:

Can I swap the image or change the title or description later on?
Yes. With the simple authoring tool, you are always able to go back and edit later on.