First off, I have been able to successfully implement custom fields within a custom meta box in Wordpress. I understand how this works.
My question is, is there a way for me to add a custom field to an already existing meta box? For instance, I want to add field within Wordpress's "Author" meta box because it is directly related to the author of a post. I haven't found any documentation or examples of this, just many regarding adding an entirely new meta box. Is it possible to add a custom field to one of Wordpress's existing meta boxes?
Thanks.
