サムネイル?

You can have Confluence automatically make a thumbnail of any inline image that is attached to a page. Clicking on the image will pop up a window containing the full-size image.

!waterfall.jpg|thumbnail!

Image Gallery

The {gallery} macro creates a gallery of thumbnails from all of the images that are attached to a page, titling each with the appropriate attachment comment.

{gallery:title=Some Confluence Features, and a Waterfall}