If you're logged in as the account owner, you can always download your own photos.
To download an image, click the download button located under the photo in the gallery or in the lightbox.
Your download will begin immediately.
Want to download an entire gallery at once? Check out this article for the how-to.
What About My Visitors?
If you'd like to allow your visitors to download your images, make sure your gallery settings have downloading ON.
Now your visitors can browse to the photo they want and click the download icon to save a copy of the photo for themselves.
Want them to be able to download an entire gallery at once? You can do that, too.