How do I add thumbnail images to the list of blog posts at http://richardclunan.com/blog/ ?
When I'm creating or editing a blog post, if I use the Featured Image link at the bottom right in the admin panel, no thumbnail appears by the corresponding blog post excerpt in the list of blog posts.
I'm using theme twentyeleven, with some modifications in a childtheme file.
Here's what I did, and the thumbnails are still not showing:
I added an image to use as a thumbnail, using the Media Library.
I added a 'Featured Image' in 'Edit Post', and in Edit Post, an image is showing there, so that looks like it should be working.
I added the url of the thumbnail in 'Custom Fields' in Edit Post.
But on the blog page, there's no thumbnail showing: http://richardclunan.com/blog/ -- the second post down 'Whodunnit...' is the post I added a thumbnail for.
(I don't know if the following is relevant, but I have a childtheme of twentyeleven. If I switch back to the twentyeleven theme, the Blog page disappears from the menu on the site, but I can still navigate to http://richardclunan.com/blog/ and still no thumbnail appears on that post.)
I've also tried installing the plugin 'Thumbnail for Excerpts' and thumbnails still don't show