Its seems something is wrong in the code of this theme in order to Serve Scaled Images (from GtMetrix reports). In any gallery Lightbox I am using I always have a 0 score in this category.
I am looking in a way to modify the code, function.php and/or content.php to be able to serve scaled images.
Could you help in this matter? Cos I do not think your Sydney Pro has fixed this issue either.