I resolved this one. I was trying to put in a logo that exceeded the 200 by 40 pixels limit. Sorry for the confusion
http://biofluidfocus.com/ebm-vs-isbm-for-bottles is an example
The plugin works on posts when the photo is at the top of the article (apparently).
Also doesn’t work with product pages like this http://biofluidfocus.com/products-page/celltreat-0-22-%C2%B5m-bottle-top-filter-250ml-pes-for-45mm-threads
I am not a sophisticated user, so may have missed something obvious to the experienced.
