Unsplash Image sizes

I am using Pinegrow 5.2 Standard and following along the videos for CSS Grid. When I insert images from Unsplash by dragging the size I want to the document tree, it is always the large image that gets inserted.
I can right-click the size description and get the correct url, but if I drag it I get the 1080px version and it overflows the containing div element.
What am I missing?

Are you using a Framework like Bootstrap, or just straight HTML? With Bootstrap, you have to check the “responsive” box, or manually add the Responsive class. With HTML, depending on how you’re placing the image, you might need to set the background property to “contain” or “cover” or the image to width: 100%; height: auto;