/* Add Next Page Button in First Row */ add_filter( 'mce_buttons', 'my_add_next_page_button', 1, 2 ); // 1st row /** * Add Next Page/Page Break Button * in WordPress Visual Editor * * @link https://shellcreeper.com/?p=889 */ function my_add_next_page_button( $buttons, $id ){ /* only add this for content editor */ if ( 'content' != $id ) return $buttons; /* add next page after more tag button */ array_splice( $buttons, 13, 0, 'wp_page' ); return $buttons; }