diff --git a/PopUps/LibraryWindow.xaml b/PopUps/LibraryWindow.xaml
index 8ba4467..42be9cc 100644
--- a/PopUps/LibraryWindow.xaml
+++ b/PopUps/LibraryWindow.xaml
@@ -5,9 +5,47 @@
         xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
         xmlns:local="clr-namespace:CtrEditor.PopUps"
         xmlns:ObjetosSim="clr-namespace:CtrEditor.ObjetosSim"
-        Title="Biblioteca de Objetos Simulables" Height="700" Width="1200"
-        WindowStartupLocation="CenterOwner" ResizeMode="CanResize"
-        Loaded="Window_Loaded">
+        xmlns:ctr="clr-namespace:CtrEditor"
+        Title="Biblioteca de Objetos Simulables" 
+        Height="{Binding Source={x:Static ctr:EstadoPersistente.Instance}, Path=LibraryWindow.Height, Mode=TwoWay}"
+        Width="{Binding Source={x:Static ctr:EstadoPersistente.Instance}, Path=LibraryWindow.Width, Mode=TwoWay}"
+        Left="{Binding Source={x:Static ctr:EstadoPersistente.Instance}, Path=LibraryWindow.Left, Mode=TwoWay}"
+        Top="{Binding Source={x:Static ctr:EstadoPersistente.Instance}, Path=LibraryWindow.Top, Mode=TwoWay}"
+        WindowStartupLocation="Manual" ResizeMode="CanResize"
+        Loaded="Window_Loaded" Closing="Window_Closing">
+    
+    <Window.Resources>
+        <BooleanToVisibilityConverter x:Key="BoolToVisConverter"/>
+        
+        <!-- Estilo para nombres largos con wrapping -->
+        <Style x:Key="WrappingTextBlockStyle" TargetType="TextBlock">
+            <Setter Property="TextWrapping" Value="Wrap"/>
+            <Setter Property="MaxWidth" Value="200"/>
+            <Setter Property="VerticalAlignment" Value="Center"/>
+        </Style>
+
+        <!-- Estilo para nombres largos con formato especial -->
+        <Style x:Key="WrappingProjectTextBlockStyle" TargetType="TextBlock" BasedOn="{StaticResource WrappingTextBlockStyle}">
+            <Style.Triggers>
+                <DataTrigger Binding="{Binding IsCurrentProject}" Value="True">
+                    <Setter Property="FontWeight" Value="Bold" />
+                    <Setter Property="Foreground" Value="Blue" />
+                </DataTrigger>
+            </Style.Triggers>
+        </Style>
+        
+        <!-- Menú contextual para directorios -->
+        <ContextMenu x:Key="DirectoryContextMenu">
+            <MenuItem Header="Nueva Biblioteca" Command="{Binding CreateLibraryInDirectoryCommand}"/>
+            <Separator/>
+            <MenuItem Header="Eliminar Directorio" Command="{Binding RemoveDirectoryCommand}"/>
+        </ContextMenu>
+        
+        <!-- Estilo para TreeViewItem de directorios -->
+        <Style x:Key="DirectoryTreeViewItemStyle" TargetType="TreeViewItem">
+            <Setter Property="ContextMenu" Value="{StaticResource DirectoryContextMenu}"/>
+        </Style>
+    </Window.Resources>
     
     <Window.InputBindings>
         <KeyBinding Key="C" Modifiers="Ctrl" Command="{Binding CopyObjectCommand}" />
@@ -17,16 +55,16 @@
 
     <Grid>
         <Grid.ColumnDefinitions>
-            <ColumnDefinition Width="250" MinWidth="200" />
+            <ColumnDefinition Width="{Binding Source={x:Static ctr:EstadoPersistente.Instance}, Path=LibraryWindow.Column0Width, Mode=TwoWay}" MinWidth="200" />
             <ColumnDefinition Width="5" />
-            <ColumnDefinition Width="300" MinWidth="250" />
+            <ColumnDefinition Width="{Binding Source={x:Static ctr:EstadoPersistente.Instance}, Path=LibraryWindow.Column2Width, Mode=TwoWay}" MinWidth="250" />
             <ColumnDefinition Width="5" />
-            <ColumnDefinition Width="350" MinWidth="250" />
+            <ColumnDefinition Width="{Binding Source={x:Static ctr:EstadoPersistente.Instance}, Path=LibraryWindow.Column4Width, Mode=TwoWay}" MinWidth="250" />
             <ColumnDefinition Width="5" />
             <ColumnDefinition Width="*" MinWidth="300" />
         </Grid.ColumnDefinitions>
 
-        <!-- Primera columna: Gestión de directorios de biblioteca -->
+        <!-- Primera columna: TreeView jerárquico de directorios y bibliotecas -->
         <Grid Grid.Column="0">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto" />
@@ -34,16 +72,45 @@
                 <RowDefinition Height="Auto" />
             </Grid.RowDefinitions>
 
-            <Label Grid.Row="0" Content="Directorios de Biblioteca" FontWeight="Bold" />
+            <Label Grid.Row="0" Content="Bibliotecas" FontWeight="Bold" />
             
-            <ListBox Grid.Row="1" Name="LibraryDirectoriesList" 
-                     ItemsSource="{Binding LibraryDirectories}"
-                     SelectedItem="{Binding SelectedLibraryDirectory, Mode=TwoWay}"
-                     DisplayMemberPath="DisplayName" />
+            <TreeView Grid.Row="1" Name="LibraryTreeView" 
+                      ItemsSource="{Binding LibraryTreeNodes}"
+                      SelectedItemChanged="LibraryTreeView_SelectedItemChanged">
+                <TreeView.ItemContainerStyleSelector>
+                    <local:LibraryTreeItemStyleSelector DirectoryStyle="{StaticResource DirectoryTreeViewItemStyle}"/>
+                </TreeView.ItemContainerStyleSelector>
+                
+                <TreeView.Resources>
+                    <!-- Template for directory and library nodes -->
+                    <HierarchicalDataTemplate DataType="{x:Type local:LibraryTreeNode}">
+                        <HierarchicalDataTemplate.ItemsSource>
+                            <Binding Path="Children"/>
+                        </HierarchicalDataTemplate.ItemsSource>
+                        
+                        <StackPanel Orientation="Horizontal" Margin="2">
+                            <TextBlock Text="📁" Margin="0,0,5,0" VerticalAlignment="Center" 
+                                       Visibility="{Binding IsDirectory, Converter={StaticResource BoolToVisConverter}}"/>
+                            <TextBlock Text="📄" Margin="0,0,5,0" VerticalAlignment="Center">
+                                <TextBlock.Style>
+                                    <Style TargetType="TextBlock">
+                                        <Setter Property="Visibility" Value="Collapsed"/>
+                                        <Style.Triggers>
+                                            <DataTrigger Binding="{Binding IsDirectory}" Value="False">
+                                                <Setter Property="Visibility" Value="Visible"/>
+                                            </DataTrigger>
+                                        </Style.Triggers>
+                                    </Style>
+                                </TextBlock.Style>
+                            </TextBlock>
+                            <TextBlock Text="{Binding DisplayName}" Style="{StaticResource WrappingProjectTextBlockStyle}"/>
+                        </StackPanel>
+                    </HierarchicalDataTemplate>
+                </TreeView.Resources>
+            </TreeView>
 
             <StackPanel Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Center" Margin="5">
-                <Button Content="Agregar" Command="{Binding AddLibraryDirectoryCommand}" Margin="2" Padding="5,2" />
-                <Button Content="Eliminar" Command="{Binding RemoveLibraryDirectoryCommand}" Margin="2" Padding="5,2" />
+                <Button Content="Agregar Directorio" Command="{Binding AddLibraryDirectoryCommand}" Margin="2" Padding="5,2" />
             </StackPanel>
         </Grid>
 
@@ -51,35 +118,25 @@
         <GridSplitter Grid.Column="1" HorizontalAlignment="Center" VerticalAlignment="Stretch" 
                       Background="LightGray" Width="5" />
 
-        <!-- Segunda columna: Bibliotecas -->
+        <!-- Segunda columna: Filtros -->
         <Grid Grid.Column="2">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto" />
                 <RowDefinition Height="*" />
-                <RowDefinition Height="Auto" />
             </Grid.RowDefinitions>
 
-            <Label Grid.Row="0" Content="Bibliotecas" FontWeight="Bold" />
-            <TreeView Grid.Row="1" Name="LibrariesTreeView"
-                      ItemsSource="{Binding Libraries}"
-                      SelectedItemChanged="LibrariesTreeView_SelectedItemChanged">
-                <TreeView.ItemTemplate>
-                    <DataTemplate>
-                        <TextBlock Text="{Binding DisplayName}" />
-                    </DataTemplate>
-                </TreeView.ItemTemplate>
-            </TreeView>
-
-            <StackPanel Grid.Row="2" Orientation="Horizontal" HorizontalAlignment="Center" Margin="5">
-                <Button Content="Nueva Biblioteca" Command="{Binding CreateNewLibraryCommand}" Margin="2" Padding="5,2" />
-            </StackPanel>
+            <Label Grid.Row="0" Content="Filtros" FontWeight="Bold" />
+            
+            <Expander Grid.Row="1" Header="Configuración de Filtros" IsExpanded="True">
+                <controls:osVisFilter x:Name="ObjectFilter" Margin="5"/>
+            </Expander>
         </Grid>
 
         <!-- GridSplitter 2 -->
         <GridSplitter Grid.Column="3" HorizontalAlignment="Center" VerticalAlignment="Stretch" 
                       Background="LightGray" Width="5" />
 
-        <!-- Tercera columna: Objetos -->
+        <!-- Tercera columna: Objetos con selección múltiple -->
         <Grid Grid.Column="4">
             <Grid.RowDefinitions>
                 <RowDefinition Height="Auto" />
@@ -88,44 +145,44 @@
                 <RowDefinition Height="Auto" />
             </Grid.RowDefinitions>
 
-            <!-- Filtros -->
-            <Expander Grid.Row="0" Header="Filtros" IsExpanded="True">
-                <controls:osVisFilter x:Name="ObjectFilter" Margin="5"/>
-            </Expander>
+            <Label Grid.Row="0" Content="Objetos" FontWeight="Bold" />
 
-            <Label Grid.Row="1" Content="Objetos" FontWeight="Bold" />
-            <TreeView Grid.Row="2" Name="ObjectsTreeView"
-                      ItemsSource="{Binding FilteredObjectsByType}"
-                      SelectedItemChanged="ObjectsTreeView_SelectedItemChanged">
-                <TreeView.Resources>
-                    <!-- Template for object type groups -->
-                    <HierarchicalDataTemplate DataType="{x:Type local:ObjectTypeGroup}" 
-                                              ItemsSource="{Binding Objects}">
-                        <TextBlock Text="{Binding TypeName}" FontWeight="Bold" />
-                    </HierarchicalDataTemplate>
-                    
-                    <!-- Template for individual objects -->
-                    <DataTemplate DataType="{x:Type ObjetosSim:osBase}">
-                        <TextBlock Text="{Binding Nombre}">
-                            <TextBlock.Style>
-                                <Style TargetType="TextBlock">
-                                    <Style.Triggers>
-                                        <DataTrigger Binding="{Binding Enable_On_All_Pages}" Value="True">
-                                            <Setter Property="Foreground" Value="Blue" />
-                                        </DataTrigger>
-                                        <DataTrigger Binding="{Binding Cloned}" Value="True">
-                                            <Setter Property="Foreground" Value="Orange" />
-                                        </DataTrigger>
-                                        <DataTrigger Binding="{Binding AutoCreated}" Value="True">
-                                            <Setter Property="Foreground" Value="Green" />
-                                        </DataTrigger>
-                                    </Style.Triggers>
-                                </Style>
-                            </TextBlock.Style>
-                        </TextBlock>
+            <!-- Controles de selección múltiple -->
+            <StackPanel Grid.Row="1" Orientation="Horizontal" Margin="5">
+                <Button Content="Seleccionar Todo" Click="SelectAllObjects_Click" Margin="2" Padding="5,2"/>
+                <Button Content="Deseleccionar Todo" Click="UnselectAllObjects_Click" Margin="2" Padding="5,2"/>
+            </StackPanel>
+
+            <!-- Listbox para objetos con checkboxes -->
+            <ListBox Grid.Row="2" Name="SelectableObjectsList" 
+                     ItemsSource="{Binding SelectableObjects}"
+                     SelectionMode="Extended">
+                <ListBox.ItemTemplate>
+                    <DataTemplate>
+                        <StackPanel Orientation="Horizontal">
+                            <CheckBox IsChecked="{Binding IsSelected, Mode=TwoWay}" 
+                                      Margin="0,0,5,0" VerticalAlignment="Center"/>
+                            <TextBlock Text="{Binding Object.Nombre}" VerticalAlignment="Center">
+                                <TextBlock.Style>
+                                    <Style TargetType="TextBlock">
+                                        <Style.Triggers>
+                                            <DataTrigger Binding="{Binding Object.Enable_On_All_Pages}" Value="True">
+                                                <Setter Property="Foreground" Value="Blue" />
+                                            </DataTrigger>
+                                            <DataTrigger Binding="{Binding Object.Cloned}" Value="True">
+                                                <Setter Property="Foreground" Value="Orange" />
+                                            </DataTrigger>
+                                            <DataTrigger Binding="{Binding Object.AutoCreated}" Value="True">
+                                                <Setter Property="Foreground" Value="Green" />
+                                            </DataTrigger>
+                                        </Style.Triggers>
+                                    </Style>
+                                </TextBlock.Style>
+                            </TextBlock>
+                        </StackPanel>
                     </DataTemplate>
-                </TreeView.Resources>
-            </TreeView>
+                </ListBox.ItemTemplate>
+            </ListBox>
 
             <!-- Botones de acción -->
             <StackPanel Grid.Row="3" Orientation="Horizontal" HorizontalAlignment="Center" Margin="5">
diff --git a/PopUps/LibraryWindow.xaml.cs b/PopUps/LibraryWindow.xaml.cs
index d5f1c00..d1ad6fd 100644
--- a/PopUps/LibraryWindow.xaml.cs
+++ b/PopUps/LibraryWindow.xaml.cs
@@ -1,6 +1,9 @@
 using System.Windows;
 using System.Windows.Controls;
 using CtrEditor.ObjetosSim;
+using System.ComponentModel;
+using System.Globalization;
+using System.Windows.Data;
 
 namespace CtrEditor.PopUps
 {
@@ -12,13 +15,57 @@ namespace CtrEditor.PopUps
         public LibraryWindow()
         {
             InitializeComponent();
+
+            // Aplicar configuraciones persistentes
+            ApplyPersistedSettings();
+
+            // Suscribirse al evento StateChanged para persistir cambios de estado
+            StateChanged += LibraryWindow_StateChanged;
         }
 
-        private void LibrariesTreeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
+        private void LibraryWindow_StateChanged(object sender, EventArgs e)
+        {
+            // Guardar el estado cuando cambia
+            EstadoPersistente.Instance.LibraryWindow.IsMaximized = WindowState == WindowState.Maximized;
+            EstadoPersistente.Instance.GuardarEstado();
+        }
+
+        private void ApplyPersistedSettings()
+        {
+            var settings = EstadoPersistente.Instance.LibraryWindow;
+
+            // Asegurar que la ventana esté dentro de los límites de la pantalla
+            var screenWidth = SystemParameters.WorkArea.Width;
+            var screenHeight = SystemParameters.WorkArea.Height;
+
+            if (settings.Left < 0 || settings.Left > screenWidth - 100)
+                settings.Left = 100;
+            if (settings.Top < 0 || settings.Top > screenHeight - 100)
+                settings.Top = 100;
+
+            if (settings.Width < 800 || settings.Width > screenWidth)
+                settings.Width = 1200;
+            if (settings.Height < 600 || settings.Height > screenHeight)
+                settings.Height = 700;
+
+            // Aplicar el estado de la ventana
+            WindowState = settings.IsMaximized ? WindowState.Maximized : WindowState.Normal;
+        }
+
+        private void LibraryTreeView_SelectedItemChanged(object sender, RoutedPropertyChangedEventArgs<object> e)
         {
             if (DataContext is LibraryWindowViewModel viewModel)
             {
-                viewModel.SelectedLibrary = e.NewValue as LibraryItem;
+                if (e.NewValue is LibraryTreeNode selectedNode)
+                {
+                    viewModel.SelectedTreeNode = selectedNode;
+
+                    // Si es una biblioteca (no directorio), establecer como biblioteca seleccionada
+                    if (!selectedNode.IsDirectory && selectedNode.Library != null)
+                    {
+                        viewModel.SelectedLibrary = selectedNode.Library;
+                    }
+                }
             }
         }
 
@@ -43,6 +90,28 @@ namespace CtrEditor.PopUps
             }
         }
 
+        private void SelectAllObjects_Click(object sender, RoutedEventArgs e)
+        {
+            if (DataContext is LibraryWindowViewModel viewModel)
+            {
+                foreach (var item in viewModel.SelectableObjects)
+                {
+                    item.IsSelected = true;
+                }
+            }
+        }
+
+        private void UnselectAllObjects_Click(object sender, RoutedEventArgs e)
+        {
+            if (DataContext is LibraryWindowViewModel viewModel)
+            {
+                foreach (var item in viewModel.SelectableObjects)
+                {
+                    item.IsSelected = false;
+                }
+            }
+        }
+
         private void CloseButton_Click(object sender, RoutedEventArgs e)
         {
             this.Close();
@@ -57,5 +126,30 @@ namespace CtrEditor.PopUps
                 viewModel.SetObjectFilter(ObjectFilter);
             }
         }
+
+        private void Window_Closing(object sender, CancelEventArgs e)
+        {
+            // Guardar configuraciones de la ventana antes de cerrar
+            SaveWindowSettings();
+        }
+
+        private void SaveWindowSettings()
+        {
+            var settings = EstadoPersistente.Instance.LibraryWindow;
+
+            if (WindowState == WindowState.Normal)
+            {
+                settings.Width = ActualWidth;
+                settings.Height = ActualHeight;
+                settings.Left = Left;
+                settings.Top = Top;
+            }
+
+            settings.IsMaximized = WindowState == WindowState.Maximized;
+
+            EstadoPersistente.Instance.GuardarEstado();
+        }
     }
+
+
 }
\ No newline at end of file
diff --git a/PopUps/LibraryWindowHelpers.cs b/PopUps/LibraryWindowHelpers.cs
new file mode 100644
index 0000000..cb784ec
--- /dev/null
+++ b/PopUps/LibraryWindowHelpers.cs
@@ -0,0 +1,48 @@
+using System.Windows;
+using System.Windows.Controls;
+using CommunityToolkit.Mvvm.ComponentModel;
+using System.Collections.ObjectModel;
+
+namespace CtrEditor.PopUps
+{
+
+
+    // StyleSelector para TreeViewItems
+    public class LibraryTreeItemStyleSelector : StyleSelector
+    {
+        public Style DirectoryStyle { get; set; }
+
+        public override Style SelectStyle(object item, DependencyObject container)
+        {
+            if (item is LibraryTreeNode node && node.IsDirectory)
+            {
+                return DirectoryStyle;
+            }
+            return null;
+        }
+    }
+
+    // Clase para nodos del TreeView jerárquico
+    public class LibraryTreeNode : ObservableObject
+    {
+        public string DisplayName { get; set; }
+        public bool IsDirectory { get; set; }
+        public bool IsCurrentProject { get; set; }
+        public string DirectoryPath { get; set; }
+        public LibraryItem Library { get; set; }
+        public ObservableCollection<LibraryTreeNode> Children { get; set; } = new ObservableCollection<LibraryTreeNode>();
+    }
+
+    // Wrapper para objetos seleccionables
+    public class SelectableObjectWrapper : ObservableObject
+    {
+        public CtrEditor.ObjetosSim.osBase Object { get; set; }
+
+        private bool _isSelected;
+        public bool IsSelected
+        {
+            get => _isSelected;
+            set => SetProperty(ref _isSelected, value);
+        }
+    }
+}
\ No newline at end of file
diff --git a/PopUps/LibraryWindowViewModel.cs b/PopUps/LibraryWindowViewModel.cs
index 41ecd51..1a18cd9 100644
--- a/PopUps/LibraryWindowViewModel.cs
+++ b/PopUps/LibraryWindowViewModel.cs
@@ -38,6 +38,17 @@ namespace CtrEditor.PopUps
         [ObservableProperty]
         private osBase selectedObject;
 
+        // Nueva propiedad para el TreeView jerárquico
+        [ObservableProperty]
+        private ObservableCollection<LibraryTreeNode> libraryTreeNodes;
+
+        [ObservableProperty]
+        private LibraryTreeNode selectedTreeNode;
+
+        // Nueva propiedad para objetos seleccionados múltiples
+        [ObservableProperty]
+        private ObservableCollection<SelectableObjectWrapper> selectableObjects;
+
         // Commands
         public ICommand AddLibraryDirectoryCommand { get; }
         public ICommand RemoveLibraryDirectoryCommand { get; }
@@ -46,6 +57,10 @@ namespace CtrEditor.PopUps
         public ICommand DeleteObjectCommand { get; }
         public ICommand CreateNewLibraryCommand { get; }
 
+        // Nuevos comandos para menú contextual
+        public ICommand CreateLibraryInDirectoryCommand { get; }
+        public ICommand RemoveDirectoryCommand { get; }
+
         public LibraryWindowViewModel(MainViewModel mainViewModel)
         {
             _mainViewModel = mainViewModel;
@@ -53,17 +68,57 @@ namespace CtrEditor.PopUps
             LibraryDirectories = new ObservableCollection<LibraryDirectoryItem>();
             Libraries = new ObservableCollection<LibraryItem>();
             FilteredObjectsByType = new ObservableCollection<ObjectTypeGroup>();
+            LibraryTreeNodes = new ObservableCollection<LibraryTreeNode>();
+            SelectableObjects = new ObservableCollection<SelectableObjectWrapper>();
 
             // Initialize commands
             AddLibraryDirectoryCommand = new RelayCommand(AddLibraryDirectory);
             RemoveLibraryDirectoryCommand = new RelayCommand(RemoveLibraryDirectory, () => SelectedLibraryDirectory != null);
-            CopyObjectCommand = new RelayCommand(CopyObject, () => SelectedObject != null);
+            CopyObjectCommand = new RelayCommand(CopyObject, () => HasSelectedObjects());
             PasteObjectCommand = new RelayCommand(PasteObject, () => SelectedLibrary != null && _clipboardObjects.Any());
-            DeleteObjectCommand = new RelayCommand(DeleteObject, () => SelectedObject != null && SelectedLibrary != null && !SelectedLibrary.IsCurrentProject);
+            DeleteObjectCommand = new RelayCommand(DeleteObject, () => HasSelectedObjects() && SelectedLibrary != null && !SelectedLibrary.IsCurrentProject);
             CreateNewLibraryCommand = new RelayCommand(CreateNewLibrary, () => SelectedLibraryDirectory != null);
 
+            // Nuevos comandos
+            CreateLibraryInDirectoryCommand = new RelayCommand(CreateLibraryInDirectory, () => SelectedTreeNode?.IsDirectory == true);
+            RemoveDirectoryCommand = new RelayCommand(RemoveDirectory, () => SelectedTreeNode?.IsDirectory == true && !SelectedTreeNode.IsCurrentProject);
+
             LoadLibraryDirectories();
-            RefreshLibraries();
+            RefreshLibraryTree();
+        }
+
+        private bool HasSelectedObjects()
+        {
+            return SelectableObjects?.Any(o => o.IsSelected) == true || SelectedObject != null;
+        }
+
+        private List<osBase> GetSelectedObjects()
+        {
+            var selected = new List<osBase>();
+
+            // Primero agregar objetos seleccionados por checkbox
+            if (SelectableObjects != null)
+            {
+                selected.AddRange(SelectableObjects.Where(o => o.IsSelected).Select(o => o.Object));
+            }
+
+            // Si no hay objetos con checkbox seleccionados, usar la selección simple
+            if (!selected.Any() && SelectedObject != null)
+            {
+                selected.Add(SelectedObject);
+            }
+
+            return selected;
+        }
+
+        partial void OnSelectedTreeNodeChanged(LibraryTreeNode value)
+        {
+            if (value?.IsDirectory == false) // Es una biblioteca
+            {
+                SelectedLibrary = value.Library;
+                LoadObjectsFromLibrary();
+            }
+            CommandManager.InvalidateRequerySuggested();
         }
 
         partial void OnSelectedLibraryDirectoryChanged(LibraryDirectoryItem value)
@@ -96,7 +151,7 @@ namespace CtrEditor.PopUps
             LibraryDirectories.Add(new LibraryDirectoryItem
             {
                 Path = _mainViewModel.directorioTrabajo,
-                DisplayName = "Proyecto Actual",
+                DisplayName = $"Proyecto Actual ({_mainViewModel.directorioTrabajo})",
                 IsCurrentProject = true
             });
 
@@ -108,7 +163,7 @@ namespace CtrEditor.PopUps
                     LibraryDirectories.Add(new LibraryDirectoryItem
                     {
                         Path = directory,
-                        DisplayName = Path.GetFileName(directory),
+                        DisplayName = directory, // Show full path instead of just folder name
                         IsCurrentProject = false
                     });
                 }
@@ -191,11 +246,27 @@ namespace CtrEditor.PopUps
                 };
 
                 string json = File.ReadAllText(filePath);
-                var simulationData = JsonConvert.DeserializeObject<SimulationData>(json, settings);
 
-                if (simulationData?.ObjetosSimulables != null)
+                // Try to detect format: check if it starts with '[' (AllPages.json format) or '{' (normal format)
+                json = json.Trim();
+
+                if (json.StartsWith("["))
                 {
-                    objects.AddRange(simulationData.ObjetosSimulables);
+                    // AllPages.json format: direct array of objects
+                    var directObjects = JsonConvert.DeserializeObject<List<osBase>>(json, settings);
+                    if (directObjects != null)
+                    {
+                        objects.AddRange(directObjects);
+                    }
+                }
+                else if (json.StartsWith("{"))
+                {
+                    // Normal format: SimulationData wrapper
+                    var simulationData = JsonConvert.DeserializeObject<SimulationData>(json, settings);
+                    if (simulationData?.ObjetosSimulables != null)
+                    {
+                        objects.AddRange(simulationData.ObjetosSimulables);
+                    }
                 }
             }
             catch (Exception ex)
@@ -209,9 +280,16 @@ namespace CtrEditor.PopUps
         private void LoadObjectsFromLibrary()
         {
             FilteredObjectsByType.Clear();
+            SelectableObjects.Clear();
 
             if (SelectedLibrary == null) return;
 
+            // Crear objetos seleccionables con checkboxes
+            foreach (var obj in SelectedLibrary.Objects)
+            {
+                SelectableObjects.Add(new SelectableObjectWrapper { Object = obj, IsSelected = false });
+            }
+
             // Update filter types and tags when library changes
             if (_objectFilter != null)
             {
@@ -374,15 +452,13 @@ namespace CtrEditor.PopUps
 
         private void CopyObject()
         {
-            if (SelectedObject != null)
+            var objectsToCopy = GetSelectedObjects();
+            if (objectsToCopy.Any())
             {
                 try
                 {
                     _clipboardObjects.Clear();
 
-                    // Prepare object for serialization
-                    SelectedObject.SalvarDatosNoSerializables();
-
                     var settings = new JsonSerializerSettings
                     {
                         Formatting = Formatting.Indented,
@@ -390,23 +466,30 @@ namespace CtrEditor.PopUps
                         TypeNameHandling = TypeNameHandling.All
                     };
 
-                    // Serialize and deserialize to create a deep copy
-                    var serializedData = JsonConvert.SerializeObject(SelectedObject, settings);
-                    var copiedObject = JsonConvert.DeserializeObject<osBase>(serializedData, settings);
-
-                    if (copiedObject != null)
+                    foreach (var obj in objectsToCopy)
                     {
-                        _clipboardObjects.Add(copiedObject);
-                        MessageBox.Show("Objeto copiado al portapapeles.", "Información", MessageBoxButton.OK, MessageBoxImage.Information);
+                        // Prepare object for serialization
+                        obj.SalvarDatosNoSerializables();
+
+                        // Serialize and deserialize to create a deep copy
+                        var serializedData = JsonConvert.SerializeObject(obj, settings);
+                        var copiedObject = JsonConvert.DeserializeObject<osBase>(serializedData, settings);
+
+                        if (copiedObject != null)
+                        {
+                            _clipboardObjects.Add(copiedObject);
+                        }
+
+                        // Restore object state
+                        obj.RestaurarDatosNoSerializables();
                     }
 
-                    // Restore object state
-                    SelectedObject.RestaurarDatosNoSerializables();
+                    MessageBox.Show($"{_clipboardObjects.Count} objeto(s) copiado(s) al portapapeles.", "Información", MessageBoxButton.OK, MessageBoxImage.Information);
                     CommandManager.InvalidateRequerySuggested();
                 }
                 catch (Exception ex)
                 {
-                    MessageBox.Show($"Error al copiar objeto: {ex.Message}", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+                    MessageBox.Show($"Error al copiar objeto(s): {ex.Message}", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
                 }
             }
         }
@@ -456,27 +539,37 @@ namespace CtrEditor.PopUps
 
         private void DeleteObject()
         {
-            if (SelectedObject != null && SelectedLibrary != null && !SelectedLibrary.IsCurrentProject)
+            var objectsToDelete = GetSelectedObjects();
+            if (objectsToDelete.Any() && SelectedLibrary != null && !SelectedLibrary.IsCurrentProject)
             {
-                var result = MessageBox.Show(
-                    $"¿Está seguro de que desea eliminar el objeto '{SelectedObject.Nombre}'?",
-                    "Confirmar eliminación",
-                    MessageBoxButton.YesNo,
-                    MessageBoxImage.Question);
+                var message = objectsToDelete.Count == 1
+                    ? $"¿Está seguro de que desea eliminar el objeto '{objectsToDelete.First().Nombre}'?"
+                    : $"¿Está seguro de que desea eliminar {objectsToDelete.Count} objetos?";
+
+                var result = MessageBox.Show(message, "Confirmar eliminación", MessageBoxButton.YesNo, MessageBoxImage.Question);
 
                 if (result == MessageBoxResult.Yes)
                 {
                     try
                     {
-                        SelectedLibrary.Objects.Remove(SelectedObject);
+                        foreach (var obj in objectsToDelete)
+                        {
+                            SelectedLibrary.Objects.Remove(obj);
+                        }
+
                         SaveLibraryToFile(SelectedLibrary);
                         LoadObjectsFromLibrary();
                         SelectedObject = null;
-                        MessageBox.Show("Objeto eliminado.", "Información", MessageBoxButton.OK, MessageBoxImage.Information);
+
+                        var successMessage = objectsToDelete.Count == 1
+                            ? "Objeto eliminado."
+                            : $"{objectsToDelete.Count} objetos eliminados.";
+
+                        MessageBox.Show(successMessage, "Información", MessageBoxButton.OK, MessageBoxImage.Information);
                     }
                     catch (Exception ex)
                     {
-                        MessageBox.Show($"Error al eliminar objeto: {ex.Message}", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+                        MessageBox.Show($"Error al eliminar objeto(s): {ex.Message}", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
                     }
                 }
             }
@@ -553,8 +646,108 @@ namespace CtrEditor.PopUps
                 MessageBox.Show($"Error al guardar biblioteca: {ex.Message}", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
             }
         }
+
+        private void RefreshLibraryTree()
+        {
+            LibraryTreeNodes.Clear();
+
+            foreach (var directory in LibraryDirectories)
+            {
+                var directoryNode = new LibraryTreeNode
+                {
+                    DisplayName = directory.DisplayName,
+                    IsDirectory = true,
+                    IsCurrentProject = directory.IsCurrentProject,
+                    DirectoryPath = directory.Path,
+                    Children = new ObservableCollection<LibraryTreeNode>()
+                };
+
+                // Agregar bibliotecas como hijos del directorio
+                if (directory.IsCurrentProject)
+                {
+                    // Agregar proyecto actual
+                    directoryNode.Children.Add(new LibraryTreeNode
+                    {
+                        DisplayName = "Proyecto Actual",
+                        IsDirectory = false,
+                        Library = new LibraryItem
+                        {
+                            Name = "Proyecto Actual",
+                            IsCurrentProject = true,
+                            Objects = _mainViewModel.ObjetosSimulables.ToList()
+                        }
+                    });
+                }
+
+                // Agregar archivos JSON
+                if (Directory.Exists(directory.Path))
+                {
+                    var jsonFiles = Directory.GetFiles(directory.Path, "*.json", SearchOption.AllDirectories);
+                    foreach (var jsonFile in jsonFiles)
+                    {
+                        try
+                        {
+                            var displayName = Path.GetFileNameWithoutExtension(jsonFile);
+                            directoryNode.Children.Add(new LibraryTreeNode
+                            {
+                                DisplayName = displayName,
+                                IsDirectory = false,
+                                Library = new LibraryItem
+                                {
+                                    Name = displayName,
+                                    FilePath = jsonFile,
+                                    IsCurrentProject = false,
+                                    Objects = LoadObjectsFromJsonFile(jsonFile)
+                                }
+                            });
+                        }
+                        catch
+                        {
+                            // Ignorar archivos que no se pueden cargar
+                        }
+                    }
+                }
+
+                LibraryTreeNodes.Add(directoryNode);
+            }
+        }
+
+        private void CreateLibraryInDirectory()
+        {
+            if (SelectedTreeNode?.IsDirectory != true) return;
+
+            var oldSelectedDirectory = SelectedLibraryDirectory;
+
+            // Temporalmente cambiar el directorio seleccionado
+            SelectedLibraryDirectory = LibraryDirectories.FirstOrDefault(d => d.Path == SelectedTreeNode.DirectoryPath);
+            CreateNewLibrary();
+            RefreshLibraryTree();
+
+            // Restaurar el directorio seleccionado
+            SelectedLibraryDirectory = oldSelectedDirectory;
+        }
+
+        private void RemoveDirectory()
+        {
+            if (SelectedTreeNode?.IsDirectory != true || SelectedTreeNode.IsCurrentProject) return;
+
+            var result = MessageBox.Show($"¿Eliminar el directorio '{SelectedTreeNode.DisplayName}' de la lista de bibliotecas?",
+                "Confirmar eliminación", MessageBoxButton.YesNo, MessageBoxImage.Question);
+
+            if (result == MessageBoxResult.Yes)
+            {
+                EstadoPersistente.Instance.LibraryDirectories.Remove(SelectedTreeNode.DirectoryPath);
+                EstadoPersistente.Instance.GuardarEstado();
+                LoadLibraryDirectories();
+                RefreshLibraryTree();
+            }
+        }
+
+
     }
 
+
+
     // Support classes
     public class LibraryDirectoryItem
     {
diff --git a/estadoPersistente.cs b/estadoPersistente.cs
index 32e4a17..9974632 100644
--- a/estadoPersistente.cs
+++ b/estadoPersistente.cs
@@ -22,6 +22,18 @@ namespace CtrEditor
         public string TargetColumn { get; set; }
     }
 
+    public class LibraryWindowSettings
+    {
+        public double Width { get; set; } = 1200;
+        public double Height { get; set; } = 700;
+        public double Left { get; set; } = 100;
+        public double Top { get; set; } = 100;
+        public double Column0Width { get; set; } = 300;
+        public double Column2Width { get; set; } = 350;
+        public double Column4Width { get; set; } = 350;
+        public bool IsMaximized { get; set; } = false;
+    }
+
     internal class EstadoPersistente
     {
         // Ruta donde se guardará el estado
@@ -44,6 +56,8 @@ namespace CtrEditor
 
         public List<string> LibraryDirectories { get; set; } = new List<string>();
 
+        public LibraryWindowSettings LibraryWindow { get; set; } = new LibraryWindowSettings();
+
         // Propiedad pública con get y set para controlar el acceso a _strDirectorioTrabajo
         public string directorio
         {
@@ -76,6 +90,7 @@ namespace CtrEditor
         {
             _strDirectorioTrabajo = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
             RecentDirectories = new List<string>();
+            LibraryWindow = new LibraryWindowSettings();
             return this;
         }
 
@@ -114,7 +129,11 @@ namespace CtrEditor
                 if (File.Exists(_filePath))
                 {
                     string json = File.ReadAllText(_filePath);
-                    return JsonSerializer.Deserialize<EstadoPersistente>(json);
+                    var estado = JsonSerializer.Deserialize<EstadoPersistente>(json);
+                    // Asegurar que LibraryWindow esté inicializado
+                    if (estado.LibraryWindow == null)
+                        estado.LibraryWindow = new LibraryWindowSettings();
+                    return estado;
                 }
                 return new EstadoPersistente().Inizializar(); // Devuelve una nueva instancia si no existe el archivo
             }