Doc Management Custom Field - how to view in the 'attachment' view on connected objects?

Hi All

I’ve created a Custom Field in Document Management and ideally want it visible in the attachment view on the connected objects. 

Is this the view the ‘DOCUMENT_VIEW_ACCESS’? If yes how can a OBJKEY be made available as I can’t get this view approved.

Or is this just not possible? If I expand to the ‘more’ option on the view the custom field is available.

Thanks for reading