Lazy loading images?

Hello
Sorry, not understood…. I images doesn appears on the front?

…

When user comes to visit an article, all full images in the gallery are loaded? They are not loading only when and if user wants to click the thumbnail to see full image?
Because this is reeeally inefficient way, especially if there are many images in the gallery. This hurts loading speed of a page and is also bad for SEO. Is it possible to change?

Hello
You can try this for example: https://www.appelsiini.net/projects/lazyload or this https://luis-almeida.github.io/unveil/