Pro tip: if your custom thumbnail doesn't show on Facebook after you've changed it in VR Editor, please visit the Facebook Debugger, enter the URL of your LiveTour and click "Debug". Then click "Scrape again". Now your thumbnail should be the right one!
1. Log to VR Editor. Choose a LiveTour and go to Basic information tab, you can upload your own social media thumbnail under the Preview photo field.
2. Copy and paste the URL of your LiveTour to Facebook, Twitter, Pinterest, LinkedIn or any other social media you are using to see the thumbnail.