Tips and tricks
From Anemos wiki
Navigation popups are easy to break.
This age is a collection of tips on how to create content within the vagaries of the MediaWiki ecosystem. Anything that people have struggled with or is byzantine to get to work, document it here to reduce suffering.
Images
To make Navigation_popups show an image (which is preferred), it seems the image needs to be in the page and downloaded on page load - if the image is in a gallery this is not the case for instance.
<!-- popup [[File:Desired_Preview_Image.jpg]] -->