Theme Curtana has full Open Graph and Twitter Cards support.
It will look for the image in the following order:
page.thumbnail if defined in your post front-matter field.
- If no specified
page.thumbnail defined, it uses Heading Background Image (aka.
page.heading-bg) if defined in your post front-matter field.
- If no heading background image found, Curtana will try to grab the first image (wrapped inside
<img>) in your post as your post thumbnail
- If nothing found, it fails back to
logo.png located at your site root.
You can always use
page.thumb_force_logo in your post front-matter field to override the above lookup.
Here’s a preview on Twitter: