How to change layout on subpages when using Jekyll theme?

So, I have this site:

If I go to one of my projects on the site: , how do I change the layout on that page? In this specific case I want to remove the picture on the left side when going to:

This is the repo:

Hi @benstigsen,

Thanks for being here! You can take a look at your assets folder and make changes there. I hope this helps!