Tips and tricks
From Anemos wiki
This page collects 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, is documented here to reduce further suffering.
Navigation popups are great, but easy to break or make ugly.
Text required at page head
Before any headers, a paragraph of body text is required for the popup to display and not generate an error.
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]] -->