If you need support from Yola please contact us via firstname.lastname@example.org or make use of our live chat service! We are working on a new approach to community-based support and during this transition period we are not adding any new threads to this forum. Many thanks to everyone who has participated over the years and we look forward to unveiling a new peer-to-peer support system soon!
Usually Facebook will use the image which is located highest on the page for the preview. Additionally, if you've just published the site, it can take a few days to register the new changes when posting the link to Facebook.