Create field of Custom Post Types

As you are using the classic editor, you can add new input fields to the editing view by creating custom metaboxes. This is done with add_meta_box(). Check out the code reference for further details and good examples on how to register a metabox, and how to save and edit post meta with it.

Although I can’t quite remember, if it is possible to have the metabox between the title and editor fields.

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