diff --git a/source/Trek-12/Models/Game/Game.cs b/source/Trek-12/Models/Game/Game.cs
index 8d8c017..1a07def 100644
--- a/source/Trek-12/Models/Game/Game.cs
+++ b/source/Trek-12/Models/Game/Game.cs
@@ -82,7 +82,16 @@ namespace Models.Game
 
         public Player CurrentPlayer { get; private set; }
 
-        public Map UsedMap { get; private set; }
+        private Map _usedMap;
+        public Map UsedMap 
+        {
+            get => _usedMap;
+            set
+            {
+                _usedMap = value;
+                OnPropertyChanged(nameof(UsedMap));
+            }
+        }
 
         public Dice Dice1 { get; private set;}
         public Dice Dice2 { get; private set; }
@@ -202,13 +211,13 @@ namespace Models.Game
                 where cell.Y == operationIndex
                 select cell;
 
-            foreach (var item in sortPaths)
-            {
+            foreach (var item in sortPaths)
+            {
                 if (!item.IsChecked)
-                {
+                {
                     item.Check();
                     break;
-                }
+                }
             }
         }
 
diff --git a/source/Trek-12/Trek-12/Views/PageBoard.xaml b/source/Trek-12/Trek-12/Views/PageBoard.xaml
index 96e86e3..627cfbb 100644
--- a/source/Trek-12/Trek-12/Views/PageBoard.xaml
+++ b/source/Trek-12/Trek-12/Views/PageBoard.xaml
@@ -80,14 +80,13 @@
         </CollectionView>
 
         <!-- Operation Grid -->
-        <Grid BackgroundColor="AliceBlue"
-              Grid.Row="0" Grid.Column="2"
+        <Grid Grid.Row="0" Grid.Column="2"
               ColumnDefinitions="auto,*"
               RowDefinitions="*,auto">
             <!--Images des operations -->
             <!--Grille de la partie-->
             <CollectionView Grid.Column="1"
-                            ItemsSource="{Binding ListMap[0].OperationGrid}"
+                            ItemsSource="{Binding ThePartie.UsedMap.OperationGrid}"
                             ItemsLayout="VerticalGrid,4"
                             WidthRequest="200"
                             HeightRequest="250"
@@ -118,20 +117,29 @@
                                    Grid.ColumnSpan="2">
                 <Button HeightRequest="50"
                         WidthRequest="100"
-                        x:Name="Lower"/>
+                        x:Name="Lower"
+                        Clicked="LowerClicked"
+                        IsVisible="False"/>
                 <Button HeightRequest="50"
                         WidthRequest="100"
                         x:Name="Higher"
-                        Clicked="HigherClicked"/>
+                        Clicked="HigherClicked"
+                        IsVisible="False"/>
                 <Button HeightRequest="50"
                          WidthRequest="100"
-                        x:Name="Substraction"/>
+                        x:Name="Substraction"
+                        Clicked="SubstractionClicked"
+                        IsVisible="False"/>
                 <Button HeightRequest="50"
                         WidthRequest="100"
-                        x:Name="Addition"/>
+                        x:Name="Addition"
+                        Clicked="AdditionClicked"
+                        IsVisible="False"/>
                 <Button HeightRequest="50"
                         WidthRequest="100"
-                        x:Name="Multiplication"/>
+                        x:Name="Multiplication"
+                        Clicked="MultiplicationClicked"
+                        IsVisible="False"/>
             </HorizontalStackLayout>
         </Grid>
     </Grid>
diff --git a/source/Trek-12/Trek-12/Views/PageBoard.xaml.cs b/source/Trek-12/Trek-12/Views/PageBoard.xaml.cs
index c0d41de..b2beb6f 100644
--- a/source/Trek-12/Trek-12/Views/PageBoard.xaml.cs
+++ b/source/Trek-12/Trek-12/Views/PageBoard.xaml.cs
@@ -26,11 +26,13 @@ public partial class PageBoard : ContentPage
 
     private void ResultMultiplication(object? sender, DiceRolledEventArgs e)
     {
+        Multiplication.IsVisible = true;
         Multiplication.Text = $"Mult {e.Dice1Value*e.Dice2Value}";
     }
 
     private void ResultSubstraction(object? sender, DiceRolledEventArgs e)
     {
+        Substraction.IsVisible = true;
         if (MyStub.ThePartie.Dice1.IsLower(MyStub.ThePartie.Dice2))
             Substraction.Text = $"Sub {e.Dice2Value - e.Dice1Value}";
         else Substraction.Text = $"Sub {e.Dice1Value - e.Dice2Value}";
@@ -38,6 +40,7 @@ public partial class PageBoard : ContentPage
 
     private void ResultHigher(object? sender, DiceRolledEventArgs e)
     {
+        Higher.IsVisible = true;
         if (MyStub.ThePartie.Dice1.IsLower(MyStub.ThePartie.Dice2))
             Higher.Text = $"Higher {e.Dice2Value}";
         else Higher.Text = $"Higher {e.Dice1Value}";
@@ -45,6 +48,7 @@ public partial class PageBoard : ContentPage
 
     private void ResultLower(object? sender, DiceRolledEventArgs e)
     {
+        Lower.IsVisible = true;
         if(MyStub.ThePartie.Dice1.IsLower(MyStub.ThePartie.Dice2))
             Lower.Text = $"Lower {e.Dice1Value}";
         else Lower.Text = $"Lower {e.Dice2Value}";
@@ -52,6 +56,7 @@ public partial class PageBoard : ContentPage
 
     private void ResultAddition(object? sender, DiceRolledEventArgs e)
     {
+        Addition.IsVisible = true;
         Addition.Text = $"Add {e.Dice1Value+e.Dice2Value}";
     }
 
@@ -79,6 +84,27 @@ public partial class PageBoard : ContentPage
     private void HigherClicked(object sender, EventArgs e)
     {
         MyStub.ThePartie.MarkOperationAsChecked(Operation.HIGHER);
+        Higher.IsVisible = false;
+    }
+
+    private void LowerClicked(object sender, EventArgs e)
+    {
+        MyStub.ThePartie.MarkOperationAsChecked(Operation.LOWER);
+    }
+
+    private void AdditionClicked(object sender, EventArgs e)
+    {
+        MyStub.ThePartie.MarkOperationAsChecked(Operation.ADDITION);
+    }
+
+    private void SubstractionClicked(object sender, EventArgs e)
+    {
+        MyStub.ThePartie.MarkOperationAsChecked(Operation.SUBTRACTION);
+    }
+
+    private void MultiplicationClicked(object sender, EventArgs e)
+    {
+        MyStub.ThePartie.MarkOperationAsChecked(Operation.MULTIPLICATION);
     }
 
     private void Button_Clicked(object sender, EventArgs e)