c80e4651_Post_PHP_Photo_Gallery_Support__Description
[Option] Display new comments/photos indicator on index? [Variable] displaynew [Description] 
For registered users who are logged in, this will track when “new” photos or comments are in a category since their last visit. A “light arrow” will be illuminated to indicate that new photos/comments have been posted since their last visit.
PhotoPost PHP Photo Gallery Support
Description