• permanyer

• December 15, 2014 at 11:17 pm

this code

function my_mce_buttons_2($buttons) {	
	/**
	 * Add in a core button that's disabled by default
	 */
	$buttons[] = 'superscript';
	$buttons[] = 'subscript';

	return $buttons;
}
add_filter('mce_buttons_2', 'my_mce_buttons_2');

from the codex worked for me