Featured image for the posts
The theme supports the Featured image function, this means you can able to display images on the home screen and the archive pages.
In the post edit mode scroll down to the “Featured image” section on the right.
To add a featured image in a WordPress post, simply click on “Set Featured Image” link inside the featured image meta box shown in the screenshot above.
This will open the WordPress Media Uploader. You can use that to upload an image from your computer or use an existing image from your media library. Once you select the image, simply click on Set Featured Image button.
The image will appear in the Featured Image meta box, like this:
Lastly don’t forget Update or Publish the post.