<p>Listens for commands at standard input. At least one command must be specified. Commands are comma seperated. A command must be followed by a colon and a value. </p>
<note style="tip">
<p>The <cmd>icon</cmd> command also accepts four stock icon values such as <var>error</var>, <var>info</var>, <var>question</var> and <var>warning</var>.</p>