function onCommand() {
		pres._repl.once( 'drain', onDrain ); // eslint-disable-line no-underscore-dangle

		/**
		* Callback invoked upon a `drain` event.
		*
		* @private
		*/
		function onDrain() {
			pres.show();
		}
	}
Redraws the current presentation slide.

@private