[Theme: MYgRID2] Featured Images Not Shown

I’m building a website to promote my paintings, and I want the home page to be filled with my images so people know what they’re getting into. I love that MYgRID2 has these Featured Images for each page, but they’re not working for me for some reason. For instance, I built a Home Page for my site and chose one of my favorite pieces as the “Featured Image”, but when I go to my site, I only see the text I’ve written and not the image. I saw another post that said you have to click on a button that says “Feature Image” after you load your picture, but I don’t see anything like that. Help!

Here’s my page so you can see what I’m talking about: gracelinearts.com