File Content: posts-columns.php <?php function pixelwars_core_manage_posts_columns__add_new_columns($columns) { return array_merge( $columns, array( 'consultify_post_feat_img' => esc_html__('Featured Image', 'pixelwars-core') ) ); } add_filter('manage_post_posts_columns', 'pixelwars_core_manage_posts_columns__add_new_columns'); add_filter('manage_page_posts_columns', 'pixelwars_core_manage_posts_columns__add_new_columns'); add_filter('manage_portfolio_posts_columns', 'pixelwars_core_manage_posts_columns__add_new_columns'); function pixelwars_core_manage_posts_custom_column__display_columns_data($column, $post_id) { if ($column == 'consultify_post_feat_img') { the_post_thumbnail( 'thumbnail', array( 'style' => 'max-height: 40px; max-width: 40px;' ) ); } } add_action('manage_post_posts_custom_column', 'pixelwars_core_manage_posts_custom_column__display_columns_data', 10, 2); add_action('manage_page_posts_custom_column', 'pixelwars_core_manage_posts_custom_column__display_columns_data', 10, 2); add_action('manage_portfolio_posts_custom_column', 'pixelwars_core_manage_posts_custom_column__display_columns_data', 10, 2); Submit