As said in the other help topics from the Create Links book, you can also add links to images, and not only text. Of course, you first have to upload the images on the remote server, and then insert them in page.
All the link types that you can add to text selections, you can add to image selections as well:
Simple URL links.
Note: When selecting (single-click) an image in the editable area, the Image Properties panel will open in the lower part of the interface. If the image is at the same time a link, you have to click the <A> tag in the Tag Selector so that the Link Properties panel will open.