In reply to Amber Hinds.

This plugin places specific emphasis on keyboard accessibility. There are four ways to close the modal: esc key, close button, tab back out of the modal, or tab through the end of the modal. Focus is restored on the corresponding image link in the content whenever (and however) the modal is closed. There is also a link to the full-size image from the modal, even when the image in the content is not linked there. If you notice any specific accessibility issues or bugs in this behavior, please report them on the plugin support forum.