Themify Fullscreen WordPress Theme GPL Overview:
Minimal design + responsive layout + fullscreen gallery = Fullscreen theme. It is a gorgeous photo gallery theme where the photos are put in center focus. Users can toggle to fullscreen mode by clicking on the fullscreen button and pressing the escape key to exit the fullscreen mode.
The fullscreen gallery can be individually assigned to Posts and Pages. For the regular WordPress gallery, there are two display options: photo swipe or lightbox. You may use Fullscreen to showcase lightbox media such as popup images, videos, and iframe windows.