@Sharonkubo-
Currently zenphoto doesn't have built in features for EXIF (yet). A couple of us have cobbled together a working implementation of EXIF capabilities (minus the ability to sort by EXIF). Tris is working hard on getting features like EXIF, plugin functionality, and more in the core product, but it isn't quite there yet. In the meantime, nose around on the forums here, and you will probably be able to find a working EXIF display module. I've got one working on my zenphoto implementation. (http://www.bushwoodworking.com/zenphoto). If you drill down to the image view, there is an EXIF choice below the image. If you click on that, it will show you EXIF information about the image.
Of course, like I said, this is just a hold over until Tris gets his EXIF stuff integrated.