If you are adding more than one image to a page, it's best to use an image gallery. These galleries can show a rotating image in the top right (inline) of your main page body, or a gallery at the bottom of the page users can explore on their own.
A single photo and caption (if you add one) shows up in the top right of your page for a few seconds, then fades and is replaced with a new image.
At the bottom of the page, a row of small "thumbnail" images shows up. Users can click a link to open the fullsize images in a new window and see all the images as a rotating slideshow.
If you already have an image in the top right of your page, you can still add a gallery. However, you can only add a summary style slideshow at the bottom of your page.