[Plugin: NextGEN Gallery] Change NextGen Image URLs

Hi,

I uploaded all my media files at wp-content/uploads including uploads for my NextGen Galleries.

I have set a subdomain (images.freedomwall.net) that directs to /wp-content/uploads. With this, my images on my posts utilizes the subdomain link, say https://images.freedomwall.net/blogger-health.png instead of the longer https://www.freedomwall.net/wp-content/uploads/blogger-health.png. Both links are active.

Now my question is, how could I rewrite the URLs of the images in my NextGen for it to automatically use the subdomain link instead of the original and longer link (the link containing wp-content/uploads).

The image link below is shows one of the images in my NextGen Gallery

https://www.freedomwall.net/wp-content/uploads/coron/coron-photo-by-john-marx-velasco-7.jpg

but I want it to be https://images.freedomwall.net/coron/coron-photo-by-john-marx-velasco-7.jpg every time I right click and Copy Image URLs.

https://www.ads-software.com/extend/plugins/nextgen-gallery/