Custom image header in a custom Taxonomy

Hi there,

For the background image, we can do this:

add_filter( 'generate_page_hero_background_image_url', function( $url ) {
    $background_image = get_post_meta( get_the_ID(), 'your_custom_field', true );

    if ( $background_image ) {
        $url = $background_image;
    }

    return $url;
} );

As for the title, I'm assuming you mean the {{post_title}} field?

If so, you can do this:

add_filter( 'generate_page_hero_post_title', function( $title ) {
    $custom_title = get_post_meta( get_the_ID(), 'your_custom_field', true );

    if ( $custom_title ) {
        $title = $custom_title;
    }

    return $title;
} );

Adding PHP: https://docs.generatepress.com/article/adding-php/