Mark button will wrap the selected text in a plain <mark> HTML element. The appearance would depend on your theme and usually resembles highlighted text.', 'tinymce-advanced' ); ?>
Clear formatting button will remove text formatting from the selected text, or from the whole paragraph if there is no selection. This includes femoval of most text styling like bold, italic, underline, background and foreground color, etc.', 'tinymce-advanced' ); ?>