@merefield and @codinghorror - I can confirm that using the Topic List Previews tool not only allows you to select which image you would like to use as the featured image for your thumbnails but when doing so, that image you select will also become the image that appears for opengraph and social sharing, instead of the default setting of displaying the first image in the post!
Here’s an example where I’ve chose to use the 8th image with the “Select Thumbnail” feature and here’s how the post now appears when sharing (and on my “Latest” topics page):
Here’s how to select a thumbnail image, using the Topic List Preview plugin…
