[Solved]-Donut Pie Chart - Add a Title - NVd3.js-d3.js

I think your looking for chart.tooltipContent() JSFiddle: http://jsbin.com/idosop/7/edit

      var tp = function(key, y, e, graph) {
            console.log(key, e, y);
            return '<h3>' + key + '</h3>' +
                   '<p>!!' +  y + '!!</p>' +
              '<p>Likes: ' +  e.point.likes + '</p>';
      };
      chart.tooltipContent(tp);