/media/editors/tinymce/skins/lightgray/skin.min.css .mce-i-tiny_mce_wiris_formulaEditor:before {content:url('http://timothybroadbent.com/media/editors/tinymce/plugins/tiny_mce_wiris/icons/formula.png');} .mce-i-tiny_mce_wiris_formulaEditorChemistry:before {content:url('http://timothybroadbent.com/media/editors/tinymce/plugins/tiny_mce_wiris/icons/chem.png');} /plugins/editors/tinymce/tinymce.php line 1856 $custom_plugin = $this-> Add 'tiny_mce_wiris' to array. line 1047 $buttons = array( Add around 1112 'tiny_mce_wiris_formulaEditor' => array('label' => 'MathType', 'plugin' => 'tiny_mce_wiris'), 'tiny_mce_wiris_formulaEditorChemistry' => array('label' => 'ChemType', 'plugin' => 'tiny_mce_wiris'), before //SpellChecker /templates/siteground-j16-19/index.php Add between