Hi,

some points that might help you:

1) for PDFs consider the extension for Advanced Indexing https://wpfilebase.com/extend/advanced-indexing/

2) you can check the generated keywords below the form when editing a file

3) For best compatibility with other plugins enable “Content Keywords” in File Page Settings of WP-Filebase. Relevanssi should then find the sites

4) Run a rescan to let WP-Filebase re-index the files after you changed a setting or installed an extension

Hope that was helpful.

@phillcoxon: Please post the shortcode here.

Regards
Fabian