Layout settings
Enabling this option alters the layout of the lightbox elements. In the alternative layout the navigational links appear under the image with the caption text, instead of being overlayed on the image itself. This doesn't apply when using Lightbox Lite.
When viewing grouped images, the navigational links to the next and previous images are only displayed when you hover over the image. Checking this box forces these links to be displayed all the time.
Unset this to always hide the image caption (usually the title).
When viewing grouped images, the Next button on the last image will display the first image, while the Previous button on the first image will display the last image.