code: function() {
        var elem = $(this);
        var data = window.kelmu.data[id];
        data.selectedElementNumber = parseInt(elem.attr('data-annotation'), 10);
        var elemData = data.definitions['step' + data.stepNumber][data.subStepNumber][data.selectedElementNumber];
  
        if (elemData.rotate) {
          elem.css('transform', 'none');
          elem.css('moz-transform', 'none');
          elem.css('webkit-transform', 'none');
          elem.css('ms-transform', 'none');
        }
      }
docs: Clears the CSS rotation of an element. The function should be called
  so that `this` referes to the element.