A WordPress plugin that allows for multiple authors on a single post and allows for multiple byline types. This plugin is a lightweight alternative to Co-Authors plus and requires Fieldmanager.
With this plugin, you can offer more than one type of byline. To do so:
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Filter
fm_bylines_filter_types
to add your custom byline typesadd_filter( 'fm_bylines_filter_types', function( $types ) { return array_merge( $types, array( 'illustrator', 'content-editor' ) ); } );
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Add support for the byline type to the post type, similar to adding in author support
add_post_type_support( $post_type, array( 'author', 'illustrator', 'content-editor' ) );