diff --git a/doc/src/examples-piechart.qdoc b/doc/src/examples-piechart.qdoc
index 66e0288..4a3c58f 100644
--- a/doc/src/examples-piechart.qdoc
+++ b/doc/src/examples-piechart.qdoc
@@ -1,9 +1,7 @@
 /*!
      \example examples/piechart
-     \title LineChart Example
+     \title Piechart Example
      \subtitle
 
-     The example shows how to create simple pie chart.
-
-     ...
-*/
\ No newline at end of file
+     The example shows how to create simple pie chart and do some customizations to a pie slice.
+*/
diff --git a/doc/src/examples-piechartdrilldown.qdoc b/doc/src/examples-piechartdrilldown.qdoc
new file mode 100644
index 0000000..3dd6571
--- /dev/null
+++ b/doc/src/examples-piechartdrilldown.qdoc
@@ -0,0 +1,7 @@
+/*!
+     \example examples/piechartdrilldown
+     \title Piechart drilldown example
+     \subtitle
+
+     The example shows how to implement a piechart with drilldown effect.
+*/
diff --git a/doc/src/examples.qdoc b/doc/src/examples.qdoc
index 7c8fa9c..c2476d1 100644
--- a/doc/src/examples.qdoc
+++ b/doc/src/examples.qdoc
@@ -13,16 +13,17 @@
         <tr>
         <td valign="top">
         <ul>
-            <li><a href="examples-areachart.html">Area Chart example</a></li>
-            <li><a href="examples-barchart.html">Bar Chart example</a></li>
-            <li><a href="examples-linechart.html">Line Chart example</a></li>
-            <li><a href="examples-percentbarchart.html">Percent Bar Chart example</a></li>
-            <li><a href="examples-piechart.html">Pie Chart example</a></li>
-            <li><a href="examples-presenterchart.html">Presenter Chart example</a></li>
-            <li><a href="examples-scatterchart.html">Scatter Chart example</a></li>
-            <li><a href="examples-splinechart.html">Spline Chart example</a></li>
-            <li><a href="examples-stackedbarchart.html">Stacked Bar Chart example</a></li>
-            <li><a href="examples-stackedbarchartdrilldown.html">Stacked Bar Chart Drilldown example</a></li>
+            <li><a href="examples-areachart.html">Area chart example</a></li>
+            <li><a href="examples-barchart.html">Bar chart example</a></li>
+            <li><a href="examples-linechart.html">Line chart example</a></li>
+            <li><a href="examples-percentbarchart.html">Percent bar chart example</a></li>
+            <li><a href="examples-piechart.html">Pie chart example</a></li>
+            <li><a href="examples-piechartdrilldown.html">Pie chart drilldown example</a></li>
+            <li><a href="examples-presenterchart.html">Presenter chart example</a></li>
+            <li><a href="examples-scatterchart.html">Scatter chart example</a></li>
+            <li><a href="examples-splinechart.html">Spline chart example</a></li>
+            <li><a href="examples-stackedbarchart.html">Stacked bar chart example</a></li>
+            <li><a href="examples-stackedbarchartdrilldown.html">Stacked bar chart drilldown example</a></li>
             <li><a href="examples-customcolors.html">Customizing colors example</a></li>
         </ul>
         </td>
diff --git a/examples/piechart/main.cpp b/examples/piechart/main.cpp
index 05607d9..8460c13 100644
--- a/examples/piechart/main.cpp
+++ b/examples/piechart/main.cpp
@@ -46,20 +46,24 @@ int main(int argc, char *argv[])
     slice->setPen(QPen(Qt::darkGreen, 2));
     slice->setBrush(Qt::green);
 //![2]
+
 //![3]
     QChart* chart = new QChart();
     chart->addSeries(series);
     chart->setTitle("Simple piechart example");
 //![3]
+
 //![4]
     QChartView* chartView = new QChartView(chart);
     chartView->setRenderHint(QPainter::Antialiasing);
 //![4]
+
 //![5]
     QMainWindow window;
     window.setCentralWidget(chartView);
     window.resize(400, 300);
     window.show();
 //![5]
+
     return a.exec();
 }
diff --git a/src/piechart/qpieslice.cpp b/src/piechart/qpieslice.cpp
index 6e6f9a0..5871936 100644
--- a/src/piechart/qpieslice.cpp
+++ b/src/piechart/qpieslice.cpp
@@ -250,8 +250,6 @@ qreal QPieSlice::labelArmLengthFactor() const
     \fn void QPieSlice::changed()
 
     This signal emitted when something has changed in the slice.
-
-    \sa QPieSeries::changed()
 */
 
 /*!