Hero images for articles

exampleSite/content/docs/thumbnails/index.md

@@ -36,4 +36,8 @@ content
 └── awesome_article
     └── featured.png
 ```
-The you just need to add an image like explain earlier. If you want to see a sample of this you can consult [this sample]({{< ref "thumbnail_sample" >}}).
+The you just need to add an image like explain earlier. If you want to see a sample of this you can consult [this sample]({{< ref "thumbnail_sample" >}}).
+
+## Hero Images
+
+Thumbnails will be used by default as hero images withing each article. Use the global `article.showHero` or the front-matter parameter `showHero` to control this feature across the entire site or for each specific post.