bug(EJ2-4407): chart descriptions added

Author: pipeline

src/chart/annotation.html

@@ -22,14 +22,15 @@
 <div id="description">
     <p>
         In this example, you can see how to render and configure annotation feature in chart. We have used a pie chart to depict the sales for each year using annotation support, while selecting a particular year from the StackedColumn series, the respective data's are showed in pie.
-An annotation can hold any html element as its content, here we have added the Pie chart as its content.   
+        An annotation can hold any html element as its content, here we have added the Pie chart as its content.   
     </p>
-
-
     <p style="font-weight: 500">Injecting Module</p>
     <p>
         Chart component features are segregated into individual feature-wise modules. To use Annotation feature, we need to inject
         <code>ChartAnnotationService</code> into the <code>@NgModule.providers</code> section.
     </p>
-    <p>
+       <p>
+        More information on the chart annotation can be found in this
+        <a target="_blank" href="http://ej2.syncfusion.com/angular/documentation/chart/api-chartAnnotation.html">documentation section</a>.
+    </p>
 </div>

src/chart/datalabel-template.html

@@ -20,4 +20,8 @@
                 Chart component features are segregated into individual feature-wise modules. To use DataLabel, we need to inject
                 <code>DataLabelService</code> into the <code>@NgModule.providers</code> section.
         </p>
+        <p>
+        More information on the Crosshair can be found in this &nbsp;
+        <a target="_blank" href="http://ej2.syncfusion.com/angular/documentation/chart/api-dataLabelSettingsModel.html">documentation section</a>.
+    </p>
 </div>