Pictures size in "column" activities

Hi! I am creating different activities using H5P and displayed via Moodle. I usually work with the Column and then introduce images + different kind of exercises. The images, however, appear to be SO big and I would like them to be displayed in a small size. I tried reducing the picture but I only get a pixelated one with the same big size. Is there a way to configure it into a smaller size? Thanks a lot,

Content types: 
BV52's picture

Hi laslilas,

The easiest way is to use a PHP hook, to add your own CSS-file to the content type. Please visit the Visual Changes page for more details.