title: I want to choose specific thumbnail from post when I share Blogger post to my FB page.
body: <p>FB sometimes offers me a couple of pics from the blog post as thumbnails, but other times just my blogger profile pic which I DO NOT want to use. I have trawled though questions but actually don't understand the answers.  Sorry.  I speak 3 foreign languages but html is not one of them.<br>
  Please could someone explain in simple language what to do?
  I reiterate - I have in the past received a a choice of pics, and that was incredibly easy. I don't understand why this has stopped and now I suddenly need a degree in computer programming to do what Facebook offered without problem previously.</p>