book cover

Hello everyone,

I hope this is the right place, but I am new to Drupal/Openscholar and have a (minor) question regarding the publication content type.
Basically I would like the "Book cover" field to appear in all publication subtypes.

I tried editing the Biblio content type, but I found that the "Book cover"/biblio_image field is included in all form variants, so supposedly it should appear in all publication sub-types. On the other hand, the field doesn't show up on the Biblio module administration page at all.