diff --git a/ApplicationCode/ProjectDataModel/GridCrossPlots/RimGridCrossPlot.cpp b/ApplicationCode/ProjectDataModel/GridCrossPlots/RimGridCrossPlot.cpp
index 13e843485a..3c66d6ee2f 100644
--- a/ApplicationCode/ProjectDataModel/GridCrossPlots/RimGridCrossPlot.cpp
+++ b/ApplicationCode/ProjectDataModel/GridCrossPlots/RimGridCrossPlot.cpp
@@ -464,8 +464,13 @@ void RimGridCrossPlot::fieldChangedByUi( const caf::PdmFieldHandle* changedField
                                          const QVariant&            oldValue,
                                          const QVariant&            newValue )
 {
+    if ( changedField == &m_showLegend )
+    {
+        m_plotWidget->setLegendVisible( m_showLegend() );
+    }
     if ( changedField == &m_legendFontSize )
     {
+        m_plotWidget->setLegendFontSize( m_legendFontSize() );
         for ( auto dataSet : m_crossPlotDataSets )
         {
             dataSet->updateLegendIcons();
@@ -541,20 +546,8 @@ void RimGridCrossPlot::updatePlot()
             dataSet->setParentQwtPlotNoReplot( m_plotWidget );
         }
 
-        if ( m_showLegend() )
-        {
-            // Will be released in plot destructor or when a new legend is set
-            QwtLegend* legend = new QwtLegend( m_plotWidget );
-
-            auto font = legend->font();
-            font.setPointSize( m_legendFontSize() );
-            legend->setFont( font );
-            m_plotWidget->insertLegend( legend, QwtPlot::BottomLegend );
-        }
-        else
-        {
-            m_plotWidget->insertLegend( nullptr );
-        }
+        m_plotWidget->setLegendVisible( m_showLegend() );
+        m_plotWidget->setLegendFontSize( m_legendFontSize() );
         m_plotWidget->updateLegendSizesToMatchPlot();
         m_plotWidget->scheduleReplot();
     }
diff --git a/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.cpp b/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.cpp
index 2549a080bc..5e24850383 100644
--- a/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.cpp
+++ b/ApplicationCode/ProjectDataModel/Summary/RimSummaryPlot.cpp
@@ -1381,13 +1381,22 @@ void RimSummaryPlot::fieldChangedByUi( const caf::PdmFieldHandle* changedField,
 {
     RimViewWindow::fieldChangedByUi( changedField, oldValue, newValue );
 
-    if ( changedField == &m_description || changedField == &m_showPlotTitle || changedField == &m_showLegend ||
-         changedField == &m_legendFontSize || changedField == &m_useAutoPlotTitle )
+    if ( changedField == &m_description || changedField == &m_showPlotTitle || changedField == &m_useAutoPlotTitle )
     {
         updatePlotTitle();
         updateConnectedEditors();
     }
 
+    if ( changedField == &m_showLegend )
+    {
+        if ( m_plotWidget ) m_plotWidget->setLegendVisible( m_showLegend );
+    }
+
+    if ( changedField == &m_legendFontSize )
+    {
+        if ( m_plotWidget ) m_plotWidget->setLegendFontSize( m_legendFontSize() );
+    }
+
     if ( changedField == &m_useAutoPlotTitle && !m_useAutoPlotTitle )
     {
         // When auto name of plot is turned off, update the auto name for all curves
@@ -1504,7 +1513,12 @@ void RimSummaryPlot::onLoadDataAndUpdate()
         curve->loadDataAndUpdate( false );
     }
 
-    if ( m_plotWidget ) m_plotWidget->updateLegend();
+    if ( m_plotWidget )
+    {
+        m_plotWidget->setLegendVisible( m_showLegend );
+        m_plotWidget->setLegendFontSize( m_legendFontSize() );
+        m_plotWidget->updateLegend();
+    }
     this->updateAxes();
 
     m_textCurveSetEditor->updateTextFilter();
@@ -1799,21 +1813,6 @@ void RimSummaryPlot::updateMdiWindowTitle()
         {
             m_plotWidget->setTitle( "" );
         }
-
-        if ( m_showLegend )
-        {
-            // Will be released in plot destructor or when a new legend is set
-            QwtLegend* legend = new QwtLegend( m_plotWidget );
-
-            auto font = legend->font();
-            font.setPointSize( m_legendFontSize() );
-            legend->setFont( font );
-            m_plotWidget->insertLegend( legend, QwtPlot::BottomLegend );
-        }
-        else
-        {
-            m_plotWidget->insertLegend( nullptr );
-        }
     }
 }
 
diff --git a/ApplicationCode/UserInterface/RiuGridCrossQwtPlot.cpp b/ApplicationCode/UserInterface/RiuGridCrossQwtPlot.cpp
index 9bd13a1011..a50f43821f 100644
--- a/ApplicationCode/UserInterface/RiuGridCrossQwtPlot.cpp
+++ b/ApplicationCode/UserInterface/RiuGridCrossQwtPlot.cpp
@@ -42,6 +42,8 @@
 #include "RimPlotAxisProperties.h"
 #include "RiuPlotAnnotationTool.h"
 
+#include "qwt_legend.h"
+#include "qwt_legend_label.h"
 #include "qwt_plot_panner.h"
 #include "qwt_scale_draw.h"
 #include "qwt_scale_widget.h"
@@ -104,6 +106,8 @@ RiuGridCrossQwtPlot::RiuGridCrossQwtPlot( RimPlotInterface* plotDefinition, QWid
 
     this->installEventFilter( this );
     this->canvas()->installEventFilter( this );
+
+    setLegendVisible( true );
 }
 
 //--------------------------------------------------------------------------------------------------
@@ -243,6 +247,42 @@ RimViewWindow* RiuGridCrossQwtPlot::ownerViewWindow() const
     return dynamic_cast<RimViewWindow*>( plotDefinition() );
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RiuGridCrossQwtPlot::setLegendFontSize( int fontSize )
+{
+    if ( legend() )
+    {
+        QFont font = legend()->font();
+        font.setPointSize( fontSize );
+        legend()->setFont( font );
+        // Set font size for all existing labels
+        QList<QwtLegendLabel*> labels = legend()->findChildren<QwtLegendLabel*>();
+        for ( QwtLegendLabel* label : labels )
+        {
+            label->setFont( font );
+        }
+    }
+    updateInfoBoxLayout();
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RiuGridCrossQwtPlot::setLegendVisible( bool visible )
+{
+    if ( visible )
+    {
+        QwtLegend* legend = new QwtLegend( this );
+        this->insertLegend( legend, BottomLegend );
+    }
+    else
+    {
+        this->insertLegend( nullptr );
+    }
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
@@ -291,9 +331,9 @@ void RiuGridCrossQwtPlot::updateInfoBoxLayout()
         if ( !infoText.empty() )
         {
             m_infoBox->label()->setText( infoText.join( "\n" ) );
-            QFont font = m_infoBox->font();
+            QFont font = m_infoBox->label()->font();
             font.setPointSize( crossPlot->legendFontSize() );
-            m_infoBox->setFont( font );
+            m_infoBox->label()->setFont( font );
             m_infoBox->adjustSize();
             QRect infoRect   = m_infoBox->frameGeometry();
             QRect canvasRect = canvas()->frameGeometry();
diff --git a/ApplicationCode/UserInterface/RiuGridCrossQwtPlot.h b/ApplicationCode/UserInterface/RiuGridCrossQwtPlot.h
index cd2124bfe1..c8fba07494 100644
--- a/ApplicationCode/UserInterface/RiuGridCrossQwtPlot.h
+++ b/ApplicationCode/UserInterface/RiuGridCrossQwtPlot.h
@@ -60,6 +60,9 @@ public:
 
     RimViewWindow* ownerViewWindow() const override;
 
+    void setLegendFontSize( int fontSize );
+    void setLegendVisible( bool visible );
+
 protected:
     void updateLayout() override;
     void updateInfoBoxLayout();
diff --git a/ApplicationCode/UserInterface/RiuSummaryQwtPlot.cpp b/ApplicationCode/UserInterface/RiuSummaryQwtPlot.cpp
index 00714bf26b..4cab2374db 100644
--- a/ApplicationCode/UserInterface/RiuSummaryQwtPlot.cpp
+++ b/ApplicationCode/UserInterface/RiuSummaryQwtPlot.cpp
@@ -53,6 +53,7 @@
 #include "qwt_date_scale_engine.h"
 #include "qwt_interval.h"
 #include "qwt_legend.h"
+#include "qwt_legend_label.h"
 #include "qwt_plot_curve.h"
 #include "qwt_plot_panner.h"
 #include "qwt_plot_zoomer.h"
@@ -128,6 +129,8 @@ RiuSummaryQwtPlot::RiuSummaryQwtPlot( RimPlotInterface* plotDefinition, QWidget*
 
     this->installEventFilter( this );
     this->canvas()->installEventFilter( this );
+
+    setLegendVisible( true );
 }
 
 //--------------------------------------------------------------------------------------------------
@@ -204,6 +207,41 @@ RimViewWindow* RiuSummaryQwtPlot::ownerViewWindow() const
     return dynamic_cast<RimViewWindow*>( plotDefinition() );
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RiuSummaryQwtPlot::setLegendFontSize( int fontSize )
+{
+    if ( legend() )
+    {
+        QFont font = legend()->font();
+        font.setPointSize( fontSize );
+        legend()->setFont( font );
+        // Set font size for all existing labels
+        QList<QwtLegendLabel*> labels = legend()->findChildren<QwtLegendLabel*>();
+        for ( QwtLegendLabel* label : labels )
+        {
+            label->setFont( font );
+        }
+    }
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RiuSummaryQwtPlot::setLegendVisible( bool visible )
+{
+    if ( visible )
+    {
+        QwtLegend* legend = new QwtLegend( this );
+        this->insertLegend( legend, BottomLegend );
+    }
+    else
+    {
+        this->insertLegend( nullptr );
+    }
+}
+
 //--------------------------------------------------------------------------------------------------
 ///
 //--------------------------------------------------------------------------------------------------
@@ -247,11 +285,6 @@ void RiuSummaryQwtPlot::setDefaults()
     QString timeFormat = RiaApplication::instance()->preferences()->timeFormat();
 
     useDateBasedTimeAxis( dateFormat, timeFormat );
-
-    // The legend will be deleted in the destructor of the plot or when
-    // another legend is inserted.
-    QwtLegend* legend = new QwtLegend( this );
-    this->insertLegend( legend, BottomLegend );
 }
 
 //--------------------------------------------------------------------------------------------------
diff --git a/ApplicationCode/UserInterface/RiuSummaryQwtPlot.h b/ApplicationCode/UserInterface/RiuSummaryQwtPlot.h
index 22c233f00b..2a1e6f5f30 100644
--- a/ApplicationCode/UserInterface/RiuSummaryQwtPlot.h
+++ b/ApplicationCode/UserInterface/RiuSummaryQwtPlot.h
@@ -55,6 +55,9 @@ public:
 
     RimViewWindow* ownerViewWindow() const override;
 
+    void setLegendFontSize( int fontSize );
+    void setLegendVisible( bool visible );
+
 protected:
     void keyPressEvent( QKeyEvent* ) override;
     void contextMenuEvent( QContextMenuEvent* ) override;