As a sidenote, I ended up on a screen where I could add entries outside of the actual content the field was created for, which I found confusing. Surely if it's added for use with a topic, I shouldn't be able to add entries outside of a topic. I did so anyway, and managed to browse the entry on the frontend of the site. It's not like that entry is available in a dropdown on new topics, so what use is it outside of a topic?

Do you know how you got to add a standalone entry in the catalogue? I cannot reproduce.

I think maybe you added a main_cc_embed pointing to that catalogue, then followed a link from there.

I've resolved the main_cc_embed issue, otherwise this is a duplicate.

The custom fields system is a generic subsystem that allows most content types to receive extra fields, but allowing individual categories to all have their own sets of fields is significantly more advanced.

It was all in the Admin Zone, I followed a do next link to view the custom field but cannot remember and cannot find where that field is now. If I can reproduce I will post the steps. I recall it was a forum topic field.

Just added a custom post field now, which is appearing on the new topic form underneath the custom topic field. Quirky, I assumed post fields would be on replies :)

Ok thanks. I clicked around a lot and couldn't find.

Alright, well it deffo happened somehow and it was all in Admin Zone until I followed the link to see the custom field listed on the frontend in normal catalogue fashion, but it's no major issue.