The picture that is displayed is based on the Open Graph og:image tag. If there is no tag on the page or you'd like to set a specific og:image tag, you can use our Easy-tag in your content by adding the following:
{SCOpenGraph image=FULL_PATH_TO_IMAGE}
There are also additional ways to set the image
described here
. Please note that after any changes to your Open Graph tags, you will need to re-scrape the page on the
Facebook Debugger
.
Let us know if this helps or if you continue to have issues.
-Melissa