@uhebeisen I could not access your test link.
If you are seeing a difference between FancyViewer in RW preview and FancyViewer on your published / exported website, then that normally indicates one of two things:
- Your web browser has cached an older version of the page and is still using old / outdated copies of the webpage. Try clearing your browser, viewing the page in a private window or using another web browser.
- The page did not fully export or publish. Files required by the page might be missing or damaged. It could be something simple like the URL you entered in the site settings does not correspond to where the page was published to.
FancyViewer works fine as a simple lightbox effect. You can configure it to open a larger image, when a smaller one is clicked. Obviously it will have less impact on a mobile device, where you are already working with a relatively constrained screen size. But I think you have the option in FancyViewer to display the lightbox effect on mobile.