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:

1. Filter fm_bylines_filter_types to add your custom byline types

   add_filter( 'fm_bylines_filter_types', function( $types ) {
   	return array_merge( $types, array( 'illustrator', 'content-editor' ) );
   } );

2. 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' ) );