Jekyll Theme customization

Hi team. I’m working on documentation website… I’m using Jekyll leap day theme for my documentation but this theme is not utilizing the entire screen space… how can customize this theme to improve to utilize more screen space and also some other custom changes. Can you please any documentation or anything how to work on this.

Themes are usually nothing more than CSS, HTML, and JavaScript, so unless someone else here knows your specific theme on this site (there are thousands), it might be hard to get the answer you are looking for. If you do not want to build the site from scratch yourself, you might want to consider finding another theme that is more to your liking.

All that said, it would be best if you share screenshots to show where you are having problems and provide more descriptions along with a link to your website and, if possible, a link to your repo.