more-buttons-post-editor

function enable_more_buttons($buttons) {

$buttons[] = 'fontselect';
$buttons[] = 'fontsizeselect';
$buttons[] = 'styleselect';
$buttons[] = 'backcolor';
$buttons[] = 'newdocument';
$buttons[] = 'cut';
$buttons[] = 'copy';
$buttons[] = 'charmap';
$buttons[] = 'hr';
$buttons[] = 'visualaid';

return $buttons;
}
add_filter("mce_buttons_3", "enable_more_buttons");