XF 1.5 Responsive images on pages


New member

On pages that I've created images aren't responsive. I tried this from another thread:

img {
width: 100%;
height: auto;

This ended up stretching the image on desktops too big. Is there a way to make the images on pages responsive using HTML, or is there an admin option I've missed? Any help would be much appreciated. Sorry if it is obvious!