diff --git a/src/axis/datetimeaxis/qdatetimeaxis.cpp b/src/axis/datetimeaxis/qdatetimeaxis.cpp
index 0d55e04..3232f36 100644
--- a/src/axis/datetimeaxis/qdatetimeaxis.cpp
+++ b/src/axis/datetimeaxis/qdatetimeaxis.cpp
@@ -79,25 +79,25 @@ QTCOMMERCIALCHART_BEGIN_NAMESPACE
 */
 
 /*!
-  \fn void QDateTimeAxis::minChanged(qreal min)
+  \fn void QDateTimeAxis::minChanged(QDateTime min)
   Axis emits signal when \a min of axis has changed.
 */
 /*!
-  \qmlsignal ValuesAxis::onMinChanged(real min)
+  \qmlsignal ValuesAxis::onMinChanged(QDateTime min)
   Axis emits signal when \a min of axis has changed.
 */
 
 /*!
-  \fn void QDateTimeAxis::maxChanged(qreal max)
+  \fn void QDateTimeAxis::maxChanged(QDateTime max)
   Axis emits signal when \a max of axis has changed.
 */
 /*!
-  \qmlsignal ValuesAxis::onMaxChanged(real max)
+  \qmlsignal ValuesAxis::onMaxChanged(QDateTime max)
   Axis emits signal when \a max of axis has changed.
 */
 
 /*!
-  \fn void QDateTimeAxis::rangeChanged(qreal min, qreal max)
+  \fn void QDateTimeAxis::rangeChanged(QDateTime min, QDateTime max)
   Axis emits signal when \a min or \a max of axis has changed.
 */
 
@@ -112,16 +112,6 @@ QTCOMMERCIALCHART_BEGIN_NAMESPACE
 */
 
 /*!
-  \property QDateTimeAxis::niceNumbersEnabled
-  Whether the nice numbers algorithm is enabled or not for the axis.
-*/
-
-/*!
-  \qmlproperty bool ValuesAxis::niceNumbersEnabled
-  Whether the nice numbers algorithm is enabled or not for the axis.
-*/
-
-/*!
     Constructs an axis object which is a child of \a parent.
 */
 QDateTimeAxis::QDateTimeAxis(QObject *parent) :
@@ -203,12 +193,22 @@ void QDateTimeAxis::setRange(QDateTime min, QDateTime max)
     }
 }
 
+/*!
+  Sets \a format string that is used when creating label for the axis out of the QDateTime object.
+  Check QDateTime documentation for information on how the string should be defined.
+  \sa formatString()
+*/
 void QDateTimeAxis::setFormatString(QString format)
 {
     Q_D(QDateTimeAxis);
     d->m_format = format;
 }
 
+/*!
+  Returns the format string that is used when creating label for the axis out of the QDateTime object.
+  Check QDateTime documentation for information on how the string should be defined.
+  \sa setFormatString()
+*/
 QString QDateTimeAxis::formatString() const
 {
     Q_D(const QDateTimeAxis);
diff --git a/src/axis/intervalsaxis/qintervalsaxis.cpp b/src/axis/intervalsaxis/qintervalsaxis.cpp
index ab2a5df..de61df0 100644
--- a/src/axis/intervalsaxis/qintervalsaxis.cpp
+++ b/src/axis/intervalsaxis/qintervalsaxis.cpp
@@ -71,7 +71,8 @@ QIntervalsAxis::QIntervalsAxis(QIntervalsAxisPrivate &d,QObject *parent):QValues
 }
 
 /*!
-    Appends \a category to axis
+    Appends new interval to the axis with an \a intervalLabel.
+    Parameter \a interval specifies the high end limit of the interval.
 */
 void QIntervalsAxis::append(const QString& intervalLabel, qreal interval)
 {
@@ -91,6 +92,9 @@ void QIntervalsAxis::append(const QString& intervalLabel, qreal interval)
     }
 }
 
+/*!
+    Sets to \a min the low end limit of the first interval on the axis.
+*/
 void QIntervalsAxis::setFisrtIntervalMinimum(qreal min)
 {
     Q_D(QIntervalsAxis);
@@ -99,16 +103,21 @@ void QIntervalsAxis::setFisrtIntervalMinimum(qreal min)
     }else{
         Range range = d->m_intervalsMap.value(d->m_intervals.first());
         d->m_intervalsMap.insert(d->m_intervals.first(), Range(min, range.second));
-//        setRange(min, d->m_min);
     }
 }
 
+/*!
+    Returns the low end limit of the interval specified by an \a intervalLabel
+*/
 qreal QIntervalsAxis::intervalMin(const QString& intervalLabel) const
 {
     Q_D(const QIntervalsAxis);
     return d->m_intervalsMap.value(intervalLabel).first;
 }
 
+/*!
+    Returns the high end limit of the interval specified by an \a intervalLabel
+*/
 qreal QIntervalsAxis::intervalMax(const QString& intervalLabel) const
 {
     Q_D(const QIntervalsAxis);
@@ -116,7 +125,7 @@ qreal QIntervalsAxis::intervalMax(const QString& intervalLabel) const
 }
 
 /*!
-    Removes \a category from axis
+    Removes \a interval from axis
 */
 void QIntervalsAxis::remove(const QString &intervalLabel)
 {
diff --git a/src/piechart/qpieseries.cpp b/src/piechart/qpieseries.cpp
index 5683238..21f2aaf 100644
--- a/src/piechart/qpieseries.cpp
+++ b/src/piechart/qpieseries.cpp
@@ -151,6 +151,37 @@ QTCOMMERCIALCHART_BEGIN_NAMESPACE
 */
 
 /*!
+    \property QPieSeries::donutInnerSize
+    \brief Defines the donut inner size.
+
+    The value is a relative value to the chart rectangle where:
+
+    \list
+    \o 0.0 is the minimum size (pie not drawn).
+    \o 1.0 is the maximum size that can fit the chart. (donut has no width)
+    \endlist
+
+    The value is never greater then size property.
+    Default value is 0.5.
+*/
+
+/*!
+    \qmlproperty real PieSeries::donutInnerSize
+
+    Defines the donut inner size.
+
+    The value is a relative value to the chart rectangle where:
+
+    \list
+    \o 0.0 is the minimum size (donut is a pie).
+    \o 1.0 is the maximum size that can fit the chart. (donut has no width)
+    \endlist
+
+    The value is never greater then size property.
+    Default value is 0.5.
+*/
+
+/*!
     \property QPieSeries::startAngle
     \brief Defines the starting angle of the pie.
 
@@ -542,8 +573,8 @@ void QPieSeries::setDonutInnerSize(qreal innerSize)
 
     if (innerSize < 0.0)
         innerSize = 0.0;
-    if (innerSize > 1.0)
-        innerSize = 1.0;
+    if (innerSize > d->m_pieRelativeSize)
+        innerSize = d->m_pieRelativeSize;
 
     d->m_donutRelativeInnerSize = innerSize;
     d->updateDerivativeData();
diff --git a/src/piechart/qpieseries.h b/src/piechart/qpieseries.h
index d78d869..a144e24 100644
--- a/src/piechart/qpieseries.h
+++ b/src/piechart/qpieseries.h
@@ -38,6 +38,8 @@ class QTCOMMERCIALCHART_EXPORT QPieSeries : public QAbstractSeries
     Q_PROPERTY(qreal endAngle READ pieEndAngle WRITE setPieEndAngle)
     Q_PROPERTY(int count READ count NOTIFY countChanged)
     Q_PROPERTY(qreal sum READ sum NOTIFY sumChanged)
+    Q_PROPERTY(qreal donutInnerSize READ donutInnerSize WRITE setDonutInnerSize)
+    Q_PROPERTY(bool donut READ donut WRITE setDonut)
 
 public:
     explicit QPieSeries(QObject *parent = 0);
diff --git a/src/piechart/qpieslice.cpp b/src/piechart/qpieslice.cpp
index aa4cc3d..5f35b01 100644
--- a/src/piechart/qpieslice.cpp
+++ b/src/piechart/qpieslice.cpp
@@ -61,7 +61,8 @@ QTCOMMERCIALCHART_BEGIN_NAMESPACE
 
  \value LabelOutside Label is outside the slice with an arm.
  \value LabelInside Label is centered inside the slice.
-
+ \value LabelInsideTangential Label is centered inside the slice and rotated to be parallel to the tangential of the slice's arc
+ \value LabelInsideNormal Label is centered inside the slice rotated to be parallel to the normal of the slice's arc.
  */
 
 /*!