diff --git a/apps/graph/app.cpp b/apps/graph/app.cpp
index 22821ee8b..94dd4b14f 100644
--- a/apps/graph/app.cpp
+++ b/apps/graph/app.cpp
@@ -11,15 +11,15 @@ App::App(Container * container, Context * context) :
   m_functionStore(FunctionStore()),
   m_xContext(VariableContext('x', context)),
   m_listController(ListController(&m_listHeader, &m_functionStore, &m_listHeader)),
-  m_listHeader(HeaderViewController(nullptr, &m_listController, &m_listController)),
+  m_listHeader(HeaderViewController(&m_listStackViewController, &m_listController, &m_listController)),
   m_listStackViewController(StackViewController(&m_tabViewController, &m_listHeader)),
   m_graphController(GraphController(&m_graphAlternateEmptyViewController, &m_functionStore, &m_graphHeader)),
   m_graphAlternateEmptyViewController(AlternateEmptyViewController(&m_graphHeader, &m_graphController, &m_graphController)),
-  m_graphHeader(HeaderViewController(nullptr, &m_graphAlternateEmptyViewController, &m_graphController)),
+  m_graphHeader(HeaderViewController(&m_graphStackViewController, &m_graphAlternateEmptyViewController, &m_graphController)),
   m_graphStackViewController(StackViewController(&m_tabViewController, &m_graphHeader)),
   m_valuesController(&m_valuesAlternateEmptyViewController, &m_functionStore, &m_valuesHeader),
   m_valuesAlternateEmptyViewController(AlternateEmptyViewController(&m_valuesHeader, &m_valuesController, &m_valuesController)),
-  m_valuesHeader(HeaderViewController(nullptr, &m_valuesAlternateEmptyViewController, &m_valuesController)),
+  m_valuesHeader(HeaderViewController(&m_valuesStackViewController, &m_valuesAlternateEmptyViewController, &m_valuesController)),
   m_valuesStackViewController(StackViewController(&m_tabViewController, &m_valuesHeader)),
   m_tabViewController(&m_inputViewController, &m_listStackViewController, &m_graphStackViewController, &m_valuesStackViewController),
   m_inputViewController(&m_modalViewController, &m_tabViewController, this)
diff --git a/apps/graph/graph/graph_controller.cpp b/apps/graph/graph/graph_controller.cpp
index 1b25de9df..78a6bb30f 100644
--- a/apps/graph/graph/graph_controller.cpp
+++ b/apps/graph/graph/graph_controller.cpp
@@ -122,6 +122,9 @@ void GraphController::reloadBannerView() {
   legend = "00(x) = ";
   legendLength = strlen(legend);
   strlcpy(buffer, legend, legendLength+1);
+  if (m_functionStore->numberOfActiveFunctions() == 0) {
+    return;
+  }
   Function * f = m_functionStore->activeFunctionAtIndex(m_indexFunctionSelectedByCursor);
   buffer[1] = f->name()[0];
   Complex::convertFloatToText(m_cursor.y(), buffer+legendLength, Complex::bufferSizeForFloatsWithPrecision(Constant::LargeNumberOfSignificantDigits), Constant::LargeNumberOfSignificantDigits, graphApp->container()->preferences()->displayMode());
diff --git a/apps/graph/values/values_controller.cpp b/apps/graph/values/values_controller.cpp
index cbdd22829..8f6a24be7 100644
--- a/apps/graph/values/values_controller.cpp
+++ b/apps/graph/values/values_controller.cpp
@@ -27,8 +27,7 @@ ValuesController::ValuesController(Responder * parentResponder, FunctionStore *
     ValuesController * valuesController = (ValuesController *) context;
     StackViewController * stack = ((StackViewController *)valuesController->stackController());
     stack->push(valuesController->intervalParameterController());
-  }, this), KDText::FontSize::Small)),
-  m_displayModeVersion(Expression::FloatDisplayMode::Auto)
+  }, this), KDText::FontSize::Small))
 {
   m_interval.setStart(0);
   m_interval.setEnd(10);
@@ -39,16 +38,6 @@ const char * ValuesController::title() const {
   return "Valeurs";
 }
 
-View * ValuesController::view() {
-  App * graphApp = (App *)app();
-  Expression::FloatDisplayMode FloatDisplayMode = graphApp->container()->preferences()->displayMode();
-  if (FloatDisplayMode != m_displayModeVersion) {
-    m_selectableTableView.reloadData();
-    m_displayModeVersion = FloatDisplayMode;
-  }
-  return EditableCellTableViewController::view();
-}
-
 Interval * ValuesController::interval() {
   return &m_interval;
 }
@@ -297,6 +286,10 @@ int ValuesController::activeColumn() {
   return m_selectableTableView.selectedColumn();
 }
 
+void ValuesController::viewWillAppear() {
+  m_selectableTableView.reloadData();
+}
+
 Function * ValuesController::functionAtColumn(int i) {
   assert(i > 0);
   int index = 1;
diff --git a/apps/graph/values/values_controller.h b/apps/graph/values/values_controller.h
index ee78ea58c..7a6d1e34d 100644
--- a/apps/graph/values/values_controller.h
+++ b/apps/graph/values/values_controller.h
@@ -17,7 +17,6 @@ class ValuesController : public Shared::EditableCellTableViewController, public
 public:
   ValuesController(Responder * parentResponder, FunctionStore * functionStore, HeaderViewController * header);
   const char * title() const override;
-  View * view() override;
   Interval * interval();
   bool handleEvent(Ion::Events::Event event) override;
   void didBecomeFirstResponder() override;
@@ -38,6 +37,7 @@ public:
   void selectCellAtLocation(int i, int j);
   int activeRow();
   int activeColumn();
+  void viewWillAppear() override;
   static constexpr KDCoordinate k_topMargin = 10;
   static constexpr KDCoordinate k_bottomMargin = 5;
   static constexpr KDCoordinate k_leftMargin = 1;
@@ -72,7 +72,6 @@ private:
   FunctionParameterController m_functionParameterController;
   DerivativeParameterController m_derivativeParameterController;
   Button m_setIntervalButton;
-  Poincare::Expression::FloatDisplayMode m_displayModeVersion;
 };
 
 }
diff --git a/apps/regression/app.cpp b/apps/regression/app.cpp
index 38854ce75..cd6101fcf 100644
--- a/apps/regression/app.cpp
+++ b/apps/regression/app.cpp
@@ -13,10 +13,10 @@ App::App(Container * container) :
   m_calculationHeader(HeaderViewController(&m_tabViewController, &m_calculationAlternateEmptyViewController, &m_calculationController)),
   m_graphController(GraphController(&m_graphAlternateEmptyViewController, &m_graphHeader, &m_store)),
   m_graphAlternateEmptyViewController(AlternateEmptyViewController(&m_graphHeader, &m_graphController, &m_graphController)),
-  m_graphHeader(HeaderViewController(nullptr, &m_graphAlternateEmptyViewController, &m_graphController)),
+  m_graphHeader(HeaderViewController(&m_graphStackViewController, &m_graphAlternateEmptyViewController, &m_graphController)),
   m_graphStackViewController(StackViewController(&m_tabViewController, &m_graphHeader)),
   m_storeController(StoreController(&m_storeHeader, &m_store, &m_storeHeader)),
-  m_storeHeader(HeaderViewController(nullptr, &m_storeController, &m_storeController)),
+  m_storeHeader(HeaderViewController(&m_storeStackViewController, &m_storeController, &m_storeController)),
   m_storeStackViewController(StackViewController(&m_tabViewController, &m_storeHeader)),
   m_tabViewController(&m_modalViewController, &m_storeStackViewController, &m_graphStackViewController, &m_calculationHeader)
 {
diff --git a/apps/shared/interactive_curve_view_controller.cpp b/apps/shared/interactive_curve_view_controller.cpp
index 63d99997b..ec0e11e33 100644
--- a/apps/shared/interactive_curve_view_controller.cpp
+++ b/apps/shared/interactive_curve_view_controller.cpp
@@ -1,8 +1,7 @@
 #include "interactive_curve_view_controller.h"
 #include "text_field_delegate_app.h"
-#include "../apps_container.h"
-#include <assert.h>
 #include <math.h>
+#include <assert.h>
 
 using namespace Poincare;
 
@@ -29,8 +28,7 @@ InteractiveCurveViewController::InteractiveCurveViewController(Responder * paren
     InteractiveCurveViewController * graphController = (InteractiveCurveViewController *) context;
     StackViewController * stack = graphController->stackController();
     stack->push(graphController->initialisationParameterController());
-  }, this), KDText::FontSize::Small),
-  m_displayModeVersion(Expression::FloatDisplayMode::Auto)
+  }, this), KDText::FontSize::Small)
 {
 }
 
@@ -39,13 +37,6 @@ const char * InteractiveCurveViewController::title() const {
 }
 
 View * InteractiveCurveViewController::view() {
-  AppsContainer * myContainer = ((TextFieldDelegateApp *)app())->container();
-  Expression::FloatDisplayMode FloatDisplayMode = myContainer->preferences()->displayMode();
-  if (FloatDisplayMode != m_displayModeVersion) {
-    reloadBannerView();
-    curveView()->reload();
-    m_displayModeVersion = FloatDisplayMode;
-  }
   return curveView();
 }
 
@@ -149,6 +140,11 @@ Responder * InteractiveCurveViewController::defaultController() {
   return tabController();
 }
 
+void InteractiveCurveViewController::viewWillAppear() {
+  reloadBannerView();
+  curveView()->reload();
+}
+
 Responder * InteractiveCurveViewController::tabController() const{
   return (parentResponder()->parentResponder()->parentResponder()->parentResponder());
 }
diff --git a/apps/shared/interactive_curve_view_controller.h b/apps/shared/interactive_curve_view_controller.h
index 74f186792..df2b084f1 100644
--- a/apps/shared/interactive_curve_view_controller.h
+++ b/apps/shared/interactive_curve_view_controller.h
@@ -27,6 +27,8 @@ public:
   Button * buttonAtIndex(int index) override;
 
   Responder * defaultController() override;
+
+  void viewWillAppear() override;
 protected:
   constexpr static float k_numberOfCursorStepsInGradUnit = 5.0f;
   virtual BannerView * bannerView() = 0;
@@ -55,7 +57,6 @@ private:
   Button m_rangeButton;
   Button m_zoomButton;
   Button m_defaultInitialisationButton;
-  Poincare::Expression::FloatDisplayMode m_displayModeVersion;
 };
 
 }
diff --git a/apps/statistics/app.cpp b/apps/statistics/app.cpp
index 37e5189d6..ad15d2ef7 100644
--- a/apps/statistics/app.cpp
+++ b/apps/statistics/app.cpp
@@ -16,10 +16,10 @@ App::App(Container * container) :
   m_boxHeader(HeaderViewController(&m_tabViewController, &m_boxAlternateEmptyViewController, &m_boxController)),
   m_histogramController(HistogramController(&m_histogramAlternateEmptyViewController, &m_histogramHeader, &m_store)),
   m_histogramAlternateEmptyViewController(AlternateEmptyViewController(&m_histogramHeader, &m_histogramController, &m_histogramController)),
-  m_histogramHeader(HeaderViewController(nullptr, &m_histogramAlternateEmptyViewController, &m_histogramController)),
+  m_histogramHeader(HeaderViewController(&m_histogramStackViewController, &m_histogramAlternateEmptyViewController, &m_histogramController)),
   m_histogramStackViewController(StackViewController(&m_tabViewController, &m_histogramHeader)),
   m_storeController(&m_storeHeader, &m_store, &m_storeHeader),
-  m_storeHeader(HeaderViewController(nullptr, &m_storeController, &m_storeController)),
+  m_storeHeader(HeaderViewController(&m_storeStackViewController, &m_storeController, &m_storeController)),
   m_storeStackViewController(StackViewController(&m_tabViewController, &m_storeHeader)),
   m_tabViewController(&m_modalViewController, &m_storeStackViewController, &m_histogramStackViewController, &m_boxHeader, &m_calculationHeader)
 {
diff --git a/apps/statistics/box_controller.cpp b/apps/statistics/box_controller.cpp
index 1aa60e966..f5f564b8d 100644
--- a/apps/statistics/box_controller.cpp
+++ b/apps/statistics/box_controller.cpp
@@ -12,8 +12,7 @@ BoxController::BoxController(Responder * parentResponder, HeaderViewController *
   HeaderViewDelegate(headerViewController),
   m_boxBannerView(BoxBannerView()),
   m_view(BoxView(store, &m_boxBannerView)),
-  m_store(store),
-  m_displayModeVersion(Expression::FloatDisplayMode::Auto)
+  m_store(store)
 {
 }
 
@@ -22,13 +21,6 @@ const char * BoxController::title() const {
 }
 
 View * BoxController::view() {
-  AppsContainer * myContainer = ((App *)app())->container();
-  Expression::FloatDisplayMode FloatDisplayMode = myContainer->preferences()->displayMode();
-  if (FloatDisplayMode != m_displayModeVersion) {
-    reloadBannerView();
-    m_view.reload();
-    m_displayModeVersion = FloatDisplayMode;
-  }
   return &m_view;
 }
 
@@ -85,4 +77,9 @@ void BoxController::reloadBannerView() {
   m_boxBannerView.setLegendAtIndex(buffer, 1);
 }
 
+void BoxController::viewWillAppear() {
+  reloadBannerView();
+  m_view.reload();
+}
+
 }
diff --git a/apps/statistics/box_controller.h b/apps/statistics/box_controller.h
index 4d39a3b63..ccaec3655 100644
--- a/apps/statistics/box_controller.h
+++ b/apps/statistics/box_controller.h
@@ -18,13 +18,13 @@ public:
   bool isEmpty() const override;
   const char * emptyMessage() override;
   Responder * defaultController() override;
+  void viewWillAppear() override;
 private:
   Responder * tabController() const;
   void reloadBannerView();
   BoxBannerView m_boxBannerView;
   BoxView m_view;
   Store * m_store;
-  Poincare::Expression::FloatDisplayMode m_displayModeVersion;
 };
 
 }
diff --git a/apps/statistics/histogram_controller.cpp b/apps/statistics/histogram_controller.cpp
index 8a62d6de4..42ad99cb7 100644
--- a/apps/statistics/histogram_controller.cpp
+++ b/apps/statistics/histogram_controller.cpp
@@ -22,8 +22,7 @@ HistogramController::HistogramController(Responder * parentResponder, HeaderView
   }, this))),
   m_store(store),
   m_cursor(CurveViewCursor()),
-  m_histogramParameterController(nullptr, store),
-  m_displayModeVersion(Expression::FloatDisplayMode::Auto)
+  m_histogramParameterController(nullptr, store)
 {
 }
 
@@ -32,13 +31,6 @@ const char * HistogramController::title() const {
 }
 
 View * HistogramController::view() {
-  AppsContainer * container = ((App *)app())->container();
-  Expression::FloatDisplayMode FloatDisplayMode = container->preferences()->displayMode();
-  if (FloatDisplayMode != m_displayModeVersion) {
-    reloadBannerView();
-    m_view.reload();
-    m_displayModeVersion = FloatDisplayMode;
-  }
   return &m_view;
 }
 
@@ -131,6 +123,11 @@ Responder * HistogramController::defaultController() {
   return tabController();
 }
 
+void HistogramController::viewWillAppear() {
+  reloadBannerView();
+  m_view.reload();
+}
+
 Responder * HistogramController::tabController() const {
   return (parentResponder()->parentResponder()->parentResponder()->parentResponder());
 }
diff --git a/apps/statistics/histogram_controller.h b/apps/statistics/histogram_controller.h
index 0d8d4aa4a..f6c7f2447 100644
--- a/apps/statistics/histogram_controller.h
+++ b/apps/statistics/histogram_controller.h
@@ -27,6 +27,7 @@ public:
   bool isEmpty() const override;
   const char * emptyMessage() override;
   Responder * defaultController() override;
+  void viewWillAppear() override;
 private:
   constexpr static int k_maxNumberOfBarsPerWindow = 280;
   constexpr static int k_maxNumberOfCharacters = 12;
@@ -47,7 +48,6 @@ private:
   uint32_t m_rangeVersion;
   int m_selectedBarIndex;
   HistogramParameterController m_histogramParameterController;
-  Poincare::Expression::FloatDisplayMode m_displayModeVersion;
 };
 
 }
diff --git a/apps/variable_box_controller.cpp b/apps/variable_box_controller.cpp
index 884d9fafb..0fb93b7f6 100644
--- a/apps/variable_box_controller.cpp
+++ b/apps/variable_box_controller.cpp
@@ -222,6 +222,10 @@ void VariableBoxController::ContentViewController::setTextFieldCaller(TextField
   m_textFieldCaller = textField;
 }
 
+void VariableBoxController::ContentViewController::reloadData() {
+  m_selectableTableView.reloadData();
+}
+
 VariableBoxController::VariableBoxController(Context * context) :
   StackViewController(nullptr, &m_contentViewController, true, KDColorWhite, Palette::PurpleBright, Palette::PurpleDark),
   m_contentViewController(ContentViewController(this, context))
@@ -236,3 +240,7 @@ void VariableBoxController::didBecomeFirstResponder() {
 void VariableBoxController::setTextFieldCaller(TextField * textField) {
   m_contentViewController.setTextFieldCaller(textField);
 }
+
+void VariableBoxController::viewWillAppear() {
+  m_contentViewController.reloadData();
+}
diff --git a/apps/variable_box_controller.h b/apps/variable_box_controller.h
index 2a5213bd8..026064254 100644
--- a/apps/variable_box_controller.h
+++ b/apps/variable_box_controller.h
@@ -10,6 +10,7 @@ public:
   VariableBoxController(Poincare::Context * context);
   void didBecomeFirstResponder() override;
   void setTextFieldCaller(TextField * textField);
+  void viewWillAppear() override;
 private:
   class ContentViewController : public ViewController, public ListViewDataSource {
   public:
@@ -27,6 +28,7 @@ private:
     int indexFromCumulatedHeight(KDCoordinate offsetY) override;
     int typeAtLocation(int i, int j) override;
     void setTextFieldCaller(TextField * textField);
+    void reloadData();
   private:
     enum class Page {
       RootMenu,