diff --git a/apps/graph/list/function_expression_cell.cpp b/apps/graph/list/function_expression_cell.cpp
index 4c9994d44..8e8e6a06c 100644
--- a/apps/graph/list/function_expression_cell.cpp
+++ b/apps/graph/list/function_expression_cell.cpp
@@ -1,20 +1,21 @@
 #include "function_expression_cell.h"
 #include <assert.h>
 
+using namespace Poincare;
+
 namespace Graph {
 
 FunctionExpressionCell::FunctionExpressionCell() :
   EvenOddCell(),
-  m_function(nullptr),
   m_expressionView(ExpressionView())
 {
 }
 
-void FunctionExpressionCell::setFunction(CartesianFunction * f) {
-  m_function = f;
-  m_expressionView.setExpression(m_function->layout());
-  bool active = m_function->isActive();
-  KDColor textColor = active ? KDColorBlack : Palette::GreyDark;
+void FunctionExpressionCell::setExpression(ExpressionLayout * expressionLayout) {
+  m_expressionView.setExpression(expressionLayout);
+}
+
+void FunctionExpressionCell::setTextColor(KDColor textColor) {
   m_expressionView.setTextColor(textColor);
 }
 
@@ -28,10 +29,6 @@ void FunctionExpressionCell::setHighlighted(bool highlight) {
   m_expressionView.setBackgroundColor(backgroundColor());
 }
 
-CartesianFunction * FunctionExpressionCell::function() {
-  return m_function;
-}
-
 int FunctionExpressionCell::numberOfSubviews() const {
   return 1;
 }
diff --git a/apps/graph/list/function_expression_cell.h b/apps/graph/list/function_expression_cell.h
index 5bf0f090b..2a7101270 100644
--- a/apps/graph/list/function_expression_cell.h
+++ b/apps/graph/list/function_expression_cell.h
@@ -2,15 +2,14 @@
 #define GRAPH_FUNCTION_EXPRESSION_CELL_H
 
 #include <escher.h>
-#include "../cartesian_function.h"
 
 namespace Graph {
 
 class FunctionExpressionCell : public EvenOddCell {
 public:
   FunctionExpressionCell();
-  virtual void setFunction(CartesianFunction * f);
-  CartesianFunction * function();
+  void setExpression(Poincare::ExpressionLayout * expressionLayout);
+  void setTextColor(KDColor color);
   void setEven(bool even) override;
   void setHighlighted(bool highlight) override;
   int numberOfSubviews() const override;
@@ -19,7 +18,6 @@ public:
   void drawRect(KDContext * ctx, KDRect rect) const override;
 private:
   constexpr static KDCoordinate k_separatorThickness = 1;
-  CartesianFunction * m_function;
   ExpressionView m_expressionView;
 };
 
diff --git a/apps/graph/list/list_controller.cpp b/apps/graph/list/list_controller.cpp
index cecd51dee..90a807fa6 100644
--- a/apps/graph/list/list_controller.cpp
+++ b/apps/graph/list/list_controller.cpp
@@ -30,8 +30,8 @@ bool ListController::handleEvent(Ion::Events::Event event) {
       || m_selectableTableView.selectedRow() == numberOfRows() - 1) {
     return false;
   }
-  FunctionExpressionCell * functionCell = (FunctionExpressionCell *)(m_selectableTableView.cellAtLocation(m_selectableTableView.selectedColumn(), m_selectableTableView.selectedRow()));
-  editExpression(functionCell, event);
+  Shared::Function * function = m_functionStore->functionAtIndex(m_selectableTableView.selectedRow());
+  editExpression(function, event);
   return true;
 }
 
@@ -54,8 +54,8 @@ bool ListController::handleEnter() {
         m_selectableTableView.reloadData();
         return true;
       }
-      FunctionExpressionCell * functionCell = (FunctionExpressionCell *)(m_selectableTableView.cellAtLocation(m_selectableTableView.selectedColumn(), m_selectableTableView.selectedRow()));
-      editExpression(functionCell, Ion::Events::OK);
+      Shared::Function * function = m_functionStore->functionAtIndex(m_selectableTableView.selectedRow());
+      editExpression(function, Ion::Events::OK);
       return true;
     }
     default:
@@ -65,23 +65,21 @@ bool ListController::handleEnter() {
   }
 }
 
-void ListController::editExpression(FunctionExpressionCell * functionCell, Ion::Events::Event event) {
+void ListController::editExpression(Function * function, Ion::Events::Event event) {
   char * initialText = nullptr;
   char initialTextContent[255];
   if (event == Ion::Events::OK) {
-    strlcpy(initialTextContent, functionCell->function()->text(), sizeof(initialTextContent));
+    strlcpy(initialTextContent, function->text(), sizeof(initialTextContent));
     initialText = initialTextContent;
   }
   App * myApp = (App *)app();
   InputViewController * inputController = myApp->inputViewController();
-  inputController->edit(this, event, functionCell, initialText,
+  inputController->edit(this, event, function, initialText,
     [](void * context, void * sender){
-    FunctionExpressionCell * myCell = (FunctionExpressionCell *) context;
-    Shared::Function * myFunction = myCell->function();
+    Shared::Function * myFunction = (Shared::Function *)context;
     InputViewController * myInputViewController = (InputViewController *)sender;
     const char * textBody = myInputViewController->textBody();
     myFunction->setContent(textBody);
-    myCell->reloadCell();
     },
     [](void * context, void * sender){
     });
@@ -122,7 +120,12 @@ void ListController::willDisplayTitleCellAtIndex(TableViewCell * cell, int j) {
 
 void ListController::willDisplayExpressionCellAtIndex(TableViewCell * cell, int j) {
   FunctionExpressionCell * myCell = (FunctionExpressionCell *)cell;
-  myCell->setFunction(((CartesianFunctionStore *)m_functionStore)->functionAtIndex(j));
+  Function * f = m_functionStore->functionAtIndex(j);
+  myCell->setExpression(f->layout());
+  bool active = f->isActive();
+  KDColor textColor = active ? KDColorBlack : Palette::GreyDark;
+  myCell->setTextColor(textColor);
 }
 
+
 }
diff --git a/apps/graph/list/list_controller.h b/apps/graph/list/list_controller.h
index 0e0189298..53b10b3a8 100644
--- a/apps/graph/list/list_controller.h
+++ b/apps/graph/list/list_controller.h
@@ -18,7 +18,7 @@ public:
   bool handleEvent(Ion::Events::Event event) override;
 private:
   bool handleEnter();
-  void editExpression(FunctionExpressionCell * functionCell, Ion::Events::Event event);
+  void editExpression(Shared::Function * function, Ion::Events::Event event);
   Shared::ListParameterController * parameterController() override;
   int maxNumberOfRows() override;
   TableViewCell * titleCells(int index) override;
diff --git a/apps/math_toolbox.cpp b/apps/math_toolbox.cpp
index 011799a74..71c37b6ba 100644
--- a/apps/math_toolbox.cpp
+++ b/apps/math_toolbox.cpp
@@ -122,6 +122,7 @@ MathToolbox::MathToolbox() :
 
 void MathToolbox::didBecomeFirstResponder() {
   m_nodeModel = (ToolboxNode *)rootModel();
+  m_selectableTableView.reloadData();
   StackViewController::didBecomeFirstResponder();
   m_stack.resetStack();
   m_listController.setFirstSelectedRow(0);
@@ -158,7 +159,6 @@ TableViewCell * MathToolbox::reusableCell(int index, int type) {
 }
 
 int MathToolbox::reusableCellCount(int type) {
-  assert(type < 2);
   return k_maxNumberOfDisplayedRows;
 }
 
@@ -210,6 +210,10 @@ void MathToolbox::viewWillDisappear() {
   m_selectableTableView.deselectTable();
 }
 
+int MathToolbox::stackDepth() {
+  return m_stack.depth();
+}
+
 TextField * MathToolbox::sender() {
   return (TextField *)Toolbox::sender();
 }
diff --git a/apps/math_toolbox.h b/apps/math_toolbox.h
index 968f9e931..be270f376 100644
--- a/apps/math_toolbox.h
+++ b/apps/math_toolbox.h
@@ -25,6 +25,11 @@ public:
   int typeAtLocation(int i, int j) override;
 
   void viewWillDisappear() override;
+protected:
+  int stackDepth();
+  TextField * sender() override;
+  SelectableTableView m_selectableTableView;
+  constexpr static int k_maxNumberOfDisplayedRows = 6; //240/40
 private:
   class Stack {
   public:
@@ -60,8 +65,6 @@ private:
   };
   constexpr static KDCoordinate k_nodeRowHeight = 40;
   constexpr static KDCoordinate k_leafRowHeight = 40;
-  constexpr static int k_maxNumberOfDisplayedRows = 6; //240/40
-  TextField * sender() override;
   const ToolboxNode * rootModel();
   bool selectLeaf(ToolboxNode * selectedNode);
   bool selectSubMenu(ToolboxNode * selectedNode);
@@ -69,7 +72,6 @@ private:
   Stack m_stack;
   ToolboxLeafCell m_leafCells[k_maxNumberOfDisplayedRows];
   ChevronMenuListCell m_nodeCells[k_maxNumberOfDisplayedRows];
-  SelectableTableView m_selectableTableView;
   ListController m_listController;
   ToolboxNode * m_nodeModel;
 };
diff --git a/apps/sequence/Makefile b/apps/sequence/Makefile
index 87b76514a..77fb0b83f 100644
--- a/apps/sequence/Makefile
+++ b/apps/sequence/Makefile
@@ -10,6 +10,7 @@ app_objs += $(addprefix apps/sequence/,\
   values/values_controller.o\
   sequence.o\
   sequence_store.o\
+  sequence_toolbox.o\
 )
 
 app_images += apps/sequence/sequence_icon.png
diff --git a/apps/sequence/app.cpp b/apps/sequence/app.cpp
index aa4c7f945..9cb4fbf81 100644
--- a/apps/sequence/app.cpp
+++ b/apps/sequence/app.cpp
@@ -7,6 +7,7 @@ namespace Sequence {
 
 App::App(Container * container, Context * context) :
   TextFieldDelegateApp(container, &m_inputViewController, "Suites", "SUITES", ImageStore::SequenceIcon),
+  m_sequenceToolbox(SequenceToolbox()),
   m_sequenceStore(SequenceStore()),
   m_nContext(VariableContext('n', context)),
   m_listController(&m_listHeader, &m_sequenceStore, &m_listHeader),
@@ -37,4 +38,12 @@ const char * App::XNT() {
   return "n";
 }
 
+SequenceToolbox * App::sequenceToolbox() {
+  return &m_sequenceToolbox;
+}
+
+SequenceStore * App::sequenceStore() {
+  return &m_sequenceStore;
+}
+
 }
diff --git a/apps/sequence/app.h b/apps/sequence/app.h
index df4b07b5c..6b12a837a 100644
--- a/apps/sequence/app.h
+++ b/apps/sequence/app.h
@@ -4,6 +4,7 @@
 #include <escher.h>
 #include <poincare.h>
 #include "sequence_store.h"
+#include "sequence_toolbox.h"
 #include "list/list_controller.h"
 #include "values/values_controller.h"
 #include "../shared/text_field_delegate_app.h"
@@ -16,7 +17,10 @@ public:
   InputViewController * inputViewController();
   Poincare::Context * localContext() override;
   const char * XNT() override;
+  SequenceToolbox * sequenceToolbox();
+  SequenceStore * sequenceStore();
 private:
+  SequenceToolbox m_sequenceToolbox;
   SequenceStore m_sequenceStore;
   Poincare::VariableContext m_nContext;
   ListController m_listController;
diff --git a/apps/sequence/list/list_controller.cpp b/apps/sequence/list/list_controller.cpp
index 9738ed4ef..b2c2d11a1 100644
--- a/apps/sequence/list/list_controller.cpp
+++ b/apps/sequence/list/list_controller.cpp
@@ -67,11 +67,11 @@ bool ListController::handleEvent(Ion::Events::Event event) {
 
 void ListController::tableViewDidChangeSelection(SelectableTableView * t, int previousSelectedCellX, int previousSelectedCellY) {
   if (m_functionStore->numberOfFunctions() == m_functionStore->maxNumberOfFunctions() || t->selectedRow() < numberOfRows() - 1) {
-    SequenceCell * myCell = (SequenceCell *)t->cellAtLocation(t->selectedColumn(), t->selectedRow());
-    app()->setFirstResponder(myCell);
     if (t->selectedRow() == -1) {
       return;
     }
+    SequenceCell * myCell = (SequenceCell *)t->cellAtLocation(t->selectedColumn(), t->selectedRow());
+    app()->setFirstResponder(myCell);
     if (t->selectedRow() == previousSelectedCellY) {
       SequenceCell * otherCell = (SequenceCell *)t->cellAtLocation(previousSelectedCellX, previousSelectedCellY);
       myCell->selectSubCell(otherCell->selectedSubCell());
diff --git a/apps/sequence/list/sequence_expression_cell.cpp b/apps/sequence/list/sequence_expression_cell.cpp
index e0f370df9..89f0aa0fd 100644
--- a/apps/sequence/list/sequence_expression_cell.cpp
+++ b/apps/sequence/list/sequence_expression_cell.cpp
@@ -66,6 +66,32 @@ bool SequenceExpressionCell::handleEvent(Ion::Events::Event event) {
   return false;
 }
 
+Toolbox * SequenceExpressionCell::toolboxForTextField(TextField * textField) {
+  SequenceToolbox * toolbox = ((App *)app())->sequenceToolbox();
+  SequenceStore * sequenceStore = ((App *)app())->sequenceStore();
+  int numberOfToolboxAddedCells = 0;
+  char * toolboxCellNames[6];
+  char * toolboxCellSubscript[6];
+  int recurrenceDepth = 0;
+  if (m_selectedSubCell == 0) {
+    recurrenceDepth = m_numberOfSubCells-1;
+  }
+  for (int k = 0; k < sequenceStore->numberOfFunctions(); k++) {
+    Sequence * s = sequenceStore->functionAtIndex(k);
+    for (int j = 0; j < recurrenceDepth; j++) {
+      toolboxCellNames[numberOfToolboxAddedCells] = (char *)s->name();
+      toolboxCellSubscript[numberOfToolboxAddedCells] = (char *)(j == 0? "n" : "n+1");
+      numberOfToolboxAddedCells++;
+    }
+  }
+  toolbox->addCells(numberOfToolboxAddedCells, toolboxCellNames, toolboxCellSubscript);
+  return toolbox;
+}
+
+TextFieldDelegateApp * SequenceExpressionCell::textFieldDelegateApp() {
+  return (App *)app();
+}
+
 EvenOddCell * SequenceExpressionCell::viewAtIndex(int index) {
   if (index == 0) {
     return &m_expressionView;
@@ -92,6 +118,7 @@ void SequenceExpressionCell::editExpression(Ion::Events::Event event) {
   }
   App * myApp = (App *)app();
   InputViewController * inputController = myApp->inputViewController();
+  inputController->setTextFieldDelegate(this);
   if (m_selectedSubCell == 0) {
     inputController->edit(this, event, this, initialText,
       [](void * context, void * sender){
diff --git a/apps/sequence/list/sequence_expression_cell.h b/apps/sequence/list/sequence_expression_cell.h
index e66eccc82..9132d4ab8 100644
--- a/apps/sequence/list/sequence_expression_cell.h
+++ b/apps/sequence/list/sequence_expression_cell.h
@@ -3,18 +3,21 @@
 
 #include "../sequence.h"
 #include "sequence_cell.h"
+#include "../../shared/text_field_delegate.h"
 #include <escher.h>
 
 namespace Sequence {
 
-class SequenceExpressionCell : public SequenceCell {
+class SequenceExpressionCell : public SequenceCell, public Shared::TextFieldDelegate {
 public:
   SequenceExpressionCell(Responder * parentResponder);
   void setSequence(Sequence * sequence) override;
   Sequence * sequence();
   void drawRect(KDContext * ctx, KDRect rect) const override;
   bool handleEvent(Ion::Events::Event event) override;
+  Toolbox * toolboxForTextField(TextField * textField) override;
 private:
+  Shared::TextFieldDelegateApp * textFieldDelegateApp() override;
   EvenOddCell * viewAtIndex(int index) override;
   void editExpression(Ion::Events::Event event);
   EvenOddExpressionCell m_expressionView;
diff --git a/apps/sequence/sequence_toolbox.cpp b/apps/sequence/sequence_toolbox.cpp
new file mode 100644
index 000000000..03c0013d5
--- /dev/null
+++ b/apps/sequence/sequence_toolbox.cpp
@@ -0,0 +1,93 @@
+#include "sequence_toolbox.h"
+#include "../../poincare/src/layout/baseline_relative_layout.h"
+#include "../../poincare/src/layout/string_layout.h"
+#include <assert.h>
+
+using namespace Poincare;
+
+namespace Sequence {
+
+SequenceToolbox::SequenceToolbox() :
+  MathToolbox(),
+  m_numberOfAddedCells(0)
+{
+}
+
+bool SequenceToolbox::handleEvent(Ion::Events::Event event) {
+  if (event == Ion::Events::OK && stackDepth() == 0) {
+    int selectedRow = m_selectableTableView.selectedRow();
+    if (selectedRow < m_numberOfAddedCells) {
+      return selectAddedCell(selectedRow);
+    }
+  }
+  return MathToolbox::handleEvent(event);
+}
+
+int SequenceToolbox::numberOfRows() {
+  if (stackDepth() == 0) {
+    return MathToolbox::numberOfRows()+m_numberOfAddedCells;
+  }
+  return MathToolbox::numberOfRows();
+}
+
+TableViewCell * SequenceToolbox::reusableCell(int index, int type) {
+  assert(type < 3);
+  assert(index >= 0);
+  assert(index < k_maxNumberOfDisplayedRows);
+  if (type == 2) {
+    return &m_addedCells[index];
+  }
+  return MathToolbox::reusableCell(index, type);
+}
+
+void SequenceToolbox::willDisplayCellForIndex(TableViewCell * cell, int index) {
+  if (typeAtLocation(0, index) == 2) {
+    ExpressionMenuListCell * myCell = (ExpressionMenuListCell *)cell;
+    myCell->setExpression(m_addedCellLayout[index]);
+    return;
+  } else {
+    MathToolbox::willDisplayCellForIndex(cell, index);
+  }
+}
+
+KDCoordinate SequenceToolbox::rowHeight(int j) {
+  if (typeAtLocation(0, j) == 2) {
+    return k_addedRowHeight;
+  }
+  return MathToolbox::rowHeight(j);
+}
+
+int SequenceToolbox::typeAtLocation(int i, int j) {
+  if (stackDepth() == 0 && j < m_numberOfAddedCells) {
+    return 2;
+  }
+  return MathToolbox::typeAtLocation(i,j);
+}
+
+void SequenceToolbox::addCells(int numberOfAddedCells, char ** cellNames, char ** cellSubscript) {
+  m_numberOfAddedCells = numberOfAddedCells;
+  for (int i = 0; i < numberOfAddedCells; i++) {
+    m_addedCellLayout[i] = new BaselineRelativeLayout(new StringLayout(cellNames[i], 1, KDText::FontSize::Large), new StringLayout(cellSubscript[i], strlen(cellSubscript[i]), KDText::FontSize::Small), BaselineRelativeLayout::Type::Subscript);
+  }
+}
+
+bool SequenceToolbox::selectAddedCell(int selectedRow){
+  char buffer[10];
+  BaselineRelativeLayout * layout = (BaselineRelativeLayout *)m_addedCellLayout[selectedRow];
+  StringLayout * nameLayout = (StringLayout *)layout->baseLayout();
+  StringLayout * subscriptLayout = (StringLayout *)layout->indiceLayout();
+  int currentChar = 0;
+  strlcpy(buffer, nameLayout->text(), strlen(nameLayout->text())+1);
+  currentChar += strlen(nameLayout->text());
+  buffer[currentChar++] = '(';
+  strlcpy(buffer+currentChar, subscriptLayout->text(), strlen(subscriptLayout->text())+1);
+  currentChar += strlen(subscriptLayout->text());
+  buffer[currentChar++] = ')';
+  buffer[currentChar] = 0;
+  sender()->insertTextAtLocation(buffer, sender()->cursorLocation());
+  sender()->setCursorLocation(sender()->cursorLocation()+currentChar);
+  app()->dismissModalViewController();
+  return true;
+}
+
+}
diff --git a/apps/sequence/sequence_toolbox.h b/apps/sequence/sequence_toolbox.h
new file mode 100644
index 000000000..c26675496
--- /dev/null
+++ b/apps/sequence/sequence_toolbox.h
@@ -0,0 +1,28 @@
+#ifndef SEQUENCE_SEQUENCE_TOOLBOX_H
+#define SEQUENCE_SEQUENCE_TOOLBOX_H
+
+#include "../math_toolbox.h"
+
+namespace Sequence {
+
+class SequenceToolbox : public MathToolbox {
+public:
+  SequenceToolbox();
+  bool handleEvent(Ion::Events::Event event) override;
+  int numberOfRows() override;
+  TableViewCell * reusableCell(int index, int type) override;
+  void willDisplayCellForIndex(TableViewCell * cell, int index) override;
+  KDCoordinate rowHeight(int j) override;
+  int typeAtLocation(int i, int j) override;
+  void addCells(int numberOfAddedCells, char ** cellNames, char ** cellSubscripts);
+private:
+  bool selectAddedCell(int selectedRow);
+  constexpr static KDCoordinate k_addedRowHeight = 20;
+  ExpressionMenuListCell m_addedCells[k_maxNumberOfDisplayedRows];
+  Poincare::ExpressionLayout * m_addedCellLayout[k_maxNumberOfDisplayedRows];
+  int m_numberOfAddedCells;
+};
+
+}
+
+#endif
diff --git a/escher/include/escher/input_view_controller.h b/escher/include/escher/input_view_controller.h
index 7bbde626c..6bb0e9fc1 100644
--- a/escher/include/escher/input_view_controller.h
+++ b/escher/include/escher/input_view_controller.h
@@ -12,6 +12,7 @@ public:
   const char * title() const override;
   void edit(Responder * caller, Ion::Events::Event event, void * context, const char * initialText, Invocation::Action successAction, Invocation::Action failureAction);
   const char * textBody();
+  void setTextFieldDelegate(TextFieldDelegate * textFieldDelegate);
   bool textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) override;
   bool textFieldDidFinishEditing(TextField * textField, const char * text) override;
   bool textFieldDidAbortEditing(TextField * textField, const char * text) override;
diff --git a/escher/src/input_view_controller.cpp b/escher/src/input_view_controller.cpp
index cc3425ac7..3483da950 100644
--- a/escher/src/input_view_controller.cpp
+++ b/escher/src/input_view_controller.cpp
@@ -49,6 +49,10 @@ void InputViewController::edit(Responder * caller, Ion::Events::Event event, voi
   }
 }
 
+void InputViewController::setTextFieldDelegate(TextFieldDelegate * textFieldDelegate) {
+  m_textFieldDelegate = textFieldDelegate;
+}
+
 bool InputViewController::textFieldDidFinishEditing(TextField * textField, const char * text) {
   m_successAction.perform(this);
   dismissModalViewController();
diff --git a/poincare/src/layout/baseline_relative_layout.cpp b/poincare/src/layout/baseline_relative_layout.cpp
index dfd2fc992..9ff635a15 100644
--- a/poincare/src/layout/baseline_relative_layout.cpp
+++ b/poincare/src/layout/baseline_relative_layout.cpp
@@ -21,6 +21,14 @@ BaselineRelativeLayout::~BaselineRelativeLayout() {
   delete m_indiceLayout;
 }
 
+ExpressionLayout * BaselineRelativeLayout::baseLayout() {
+  return m_baseLayout;
+}
+
+ExpressionLayout * BaselineRelativeLayout::indiceLayout() {
+  return m_indiceLayout;
+}
+
 void BaselineRelativeLayout::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
   // There is nothing to draw for a subscript/superscript, only the position of the children matters
 }
diff --git a/poincare/src/layout/baseline_relative_layout.h b/poincare/src/layout/baseline_relative_layout.h
index 2e19a293d..2382d5c50 100644
--- a/poincare/src/layout/baseline_relative_layout.h
+++ b/poincare/src/layout/baseline_relative_layout.h
@@ -14,6 +14,8 @@ class BaselineRelativeLayout : public ExpressionLayout {
     };
     BaselineRelativeLayout(ExpressionLayout * baseLayout, ExpressionLayout * indiceLayout, Type type);
     ~BaselineRelativeLayout();
+    ExpressionLayout * baseLayout();
+    ExpressionLayout * indiceLayout();
   protected:
     void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
     KDSize computeSize() override;
diff --git a/poincare/src/layout/string_layout.cpp b/poincare/src/layout/string_layout.cpp
index 88ee73ff1..4df0ce63d 100644
--- a/poincare/src/layout/string_layout.cpp
+++ b/poincare/src/layout/string_layout.cpp
@@ -19,6 +19,10 @@ StringLayout::~StringLayout() {
   free(m_string);
 }
 
+char * StringLayout::text() {
+  return m_string;
+}
+
 ExpressionLayout * StringLayout::child(uint16_t index) {
   return nullptr;
 }
diff --git a/poincare/src/layout/string_layout.h b/poincare/src/layout/string_layout.h
index ed94f4a25..3a286ee81 100644
--- a/poincare/src/layout/string_layout.h
+++ b/poincare/src/layout/string_layout.h
@@ -13,6 +13,7 @@ class StringLayout : public ExpressionLayout {
     // sure about compatibility.
     StringLayout(const char * string, size_t length, KDText::FontSize fontSize = KDText::FontSize::Large);
     ~StringLayout();
+    char * text();
   protected:
     void render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) override;
     KDSize computeSize() override;