So, I'm talking about a image page like this:
https://www.goodfreephotos.com/united-states/north-dakota/fargo/us-department-of-agriculture-research-facility-at-north-dakota-state-university.jpg.php
The image display on that page seems to just a a resized version of the full image when you click on the image to display it full screen. That causes the webpage to be too big and causes long loading times, especially on mobile.
Is there a way on the image page to have the clickable image to a smaller version or a much compressed version of the full image when clicked? I still want the full-screen image when click to actually be the full uncompressed image, just not when its displayed on the webpage.