Changing Image size?

Hi, I’m trying to make my page look like one of the example pictures but I’m struggling to get the preview picture to change in layout 3. I’ve tried multiple pictures and no matter what I just can’t get it to work. I’m trying to get layout 3 with 1 column.

Here is the example I am talking about: https://ps.w.org/the-post-grid/assets/screenshot-04.png?rev=1362513

Here is my page: http://www.twitchdoctor.com/804-2/ It’s currently set to large…

Any help would be appreciated been trying to sort this page out for months.

• This topic was modified 7 years, 10 months ago by ramunegaming.

The page I need help with: [log in to see the link]