In this topic you will add a simple JavaScript function in your source page and apply the JavaScript function name to the Hint object.

1. Add the following JavaScript function to your source page

   <script type="text/javascript">
   

           function hintContent() {
   

               return this.label + ' ' + this.y + '';
   

           }
   

   </script>
   

2. In design view right-click on the C1CompositeChart and select Properties to open C1CompositeChart’s Properties window.
3. Expand Hint->Content and set the Function property to hintContent. This will apply the JavaScript function to the chart tooltip.