diff --git a/copasi/UI/CQFittingWidget.cpp b/copasi/UI/CQFittingWidget.cpp
index c3d11471d4..c89aaa6731 100644
--- a/copasi/UI/CQFittingWidget.cpp
+++ b/copasi/UI/CQFittingWidget.cpp
@@ -373,6 +373,44 @@ void CQFittingWidget::init()
   mpCurrentList = mpParameters;
   mpExperimentSet = NULL;
   mpCrossValidationSet = NULL;
+
+  // add 2 more tab pages that when clicked will increase / decrease the height of the tab widget
+  QToolButton * tb = new QToolButton();
+  tb->setText("+");
+  QObject::connect(tb, SIGNAL(clicked()), this, SLOT(slotIncreaseTabHeight()));
+  // Add empty, not enabled tab to tabWidget
+  mpTabWidget->addTab(new QLabel("Add height by pressing \"+\""), QString());
+  mpTabWidget->setTabEnabled(2, false);
+  // Add tab button to current tab. Button will be enabled, but tab -- not
+  mpTabWidget->tabBar()->setTabButton(2, QTabBar::RightSide, tb);
+
+  tb = new QToolButton();
+  tb->setText("-");
+  QObject::connect(tb, SIGNAL(clicked()), this, SLOT(slotDecreaseTabHeight()));
+  // Add empty, not enabled tab to tabWidget
+  mpTabWidget->addTab(new QLabel("Remove height by pressing \"-\""), QString());
+  mpTabWidget->setTabEnabled(3, false);
+  // Add tab button to current tab. Button will be enabled, but tab -- not
+  mpTabWidget->tabBar()->setTabButton(3, QTabBar::RightSide, tb);
+
+
+}
+
+void CQFittingWidget::slotIncreaseTabHeight()
+{
+  auto height = mpTabWidget->height();
+  height += 100;
+  mpTabWidget->setMinimumHeight(height);
+}
+
+
+void CQFittingWidget::slotDecreaseTabHeight()
+{
+  auto height = mpTabWidget->height();
+  if (height < 300)
+    return;
+  height -= 100;
+  mpTabWidget->setMinimumHeight(height);
 }
 
 void CQFittingWidget::slotParameterNumberChanged(int number)
diff --git a/copasi/UI/CQFittingWidget.h b/copasi/UI/CQFittingWidget.h
index 2db20ef366..2956d604cc 100644
--- a/copasi/UI/CQFittingWidget.h
+++ b/copasi/UI/CQFittingWidget.h
@@ -41,6 +41,8 @@ class CQFittingWidget : public TaskWidget, public Ui::CQFittingWidget
 public slots:
   void slotParameterNumberChanged(int number);
   void slotConstraintNumberChanged(int number);
+  void slotIncreaseTabHeight();
+  void slotDecreaseTabHeight();
 
 protected:
   CQFittingItemWidget * mpCurrentList;
diff --git a/copasi/UI/CQOptimizationWidget.cpp b/copasi/UI/CQOptimizationWidget.cpp
index ab4fafbae5..c8877b8e7c 100644
--- a/copasi/UI/CQOptimizationWidget.cpp
+++ b/copasi/UI/CQOptimizationWidget.cpp
@@ -242,8 +242,44 @@ void CQOptimizationWidget::init()
   connect(mpConstraints, SIGNAL(numberChanged(int)), this, SLOT(slotConstraintNumberChanged(int)));
 
   mpCurrentList = mpParameters;
+
+  // add 2 more tab pages that when clicked will increase / decrease the height of the tab widget
+  QToolButton * tb = new QToolButton();
+  tb->setText("+");
+  QObject::connect(tb, SIGNAL(clicked()), this, SLOT(slotIncreaseTabHeight()));
+  // Add empty, not enabled tab to tabWidget
+  mpTabWidget->addTab(new QLabel("Add height by pressing \"+\""), QString());
+  mpTabWidget->setTabEnabled(2, false);
+  // Add tab button to current tab. Button will be enabled, but tab -- not
+  mpTabWidget->tabBar()->setTabButton(2, QTabBar::RightSide, tb);
+
+  tb = new QToolButton();
+  tb->setText("-");
+  QObject::connect(tb, SIGNAL(clicked()), this, SLOT(slotDecreaseTabHeight()));
+  // Add empty, not enabled tab to tabWidget
+  mpTabWidget->addTab(new QLabel("Remove height by pressing \"-\""), QString());
+  mpTabWidget->setTabEnabled(3, false);
+  // Add tab button to current tab. Button will be enabled, but tab -- not
+  mpTabWidget->tabBar()->setTabButton(3, QTabBar::RightSide, tb);
+}
+
+void CQOptimizationWidget::slotIncreaseTabHeight()
+{
+  auto height = mpTabWidget->height();
+  height += 100;
+  mpTabWidget->setMinimumHeight(height);
 }
 
+void CQOptimizationWidget::slotDecreaseTabHeight()
+{
+  auto height = mpTabWidget->height();
+  if (height < 300)
+    return;
+  height -= 100;
+  mpTabWidget->setMinimumHeight(height);
+}
+
+
 void CQOptimizationWidget::destroy()
 {}
 
diff --git a/copasi/UI/CQOptimizationWidget.h b/copasi/UI/CQOptimizationWidget.h
index 5010e0927e..1e2dd07d5d 100644
--- a/copasi/UI/CQOptimizationWidget.h
+++ b/copasi/UI/CQOptimizationWidget.h
@@ -45,6 +45,9 @@ public slots:
   void slotParameterNumberChanged(int number);
   void slotConstraintNumberChanged(int number);
   virtual void slotEditExpression();
+  void slotIncreaseTabHeight();
+  void slotDecreaseTabHeight();
+
 
 protected:
   CQFittingItemWidget * mpCurrentList;