diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Components/GameCreationForm.razor b/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Components/GameCreationForm.razor
index c223842..02ae4db 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Components/GameCreationForm.razor
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Components/GameCreationForm.razor
@@ -19,13 +19,15 @@
             </div>
             <div class="input-game">
                 <div class="label">@ResourcesKey.Developers :</div>
-                <SelectSearch TItem="DeveloperDto" Theme="Theme" GetLabel="@(i => i.Name)" 
-                              Items="Categories?.Developers" @bind-Values=GameDto.Developers />
+                <SelectSearch TItem="DeveloperDto" Theme="Theme" GetLabel="@(i => i.Name)" QuickAdd=true
+                              Items="Categories?.Developers" @bind-Values=GameDto.Developers 
+                              AddItem="@(str => new DeveloperDto() { Name = str })" />
             </div>
             <div class="input-game">
                 <div class="label">@ResourcesKey.Publishers :</div>
-                <SelectSearch TItem="PublisherDto" Theme="Theme" GetLabel="@(i => i.Name)"
-                              Items="Categories?.Publishers" @bind-Values=GameDto.Publishers />
+                <SelectSearch TItem="PublisherDto" Theme="Theme" GetLabel="@(i => i.Name)" QuickAdd=true
+                              Items="Categories?.Publishers" @bind-Values=GameDto.Publishers
+                              AddItem="@(str => new PublisherDto() { Name = str })" />
             </div>
         </div>
         <div class="container">
@@ -37,19 +39,22 @@
             </div>
             <div class="input-game">
                 <div class="label">@ResourcesKey.Properties :</div>
-                <SelectSearch TItem="PropertyDto" Theme="Theme" GetLabel="@(i => i.Label)"
-                              Items="Categories?.Properties" @bind-Values=GameDto.Properties />
+                <SelectSearch TItem="PropertyDto" Theme="Theme" GetLabel="@(i => i.Label)" QuickAdd=true
+                              Items="Categories?.Properties" @bind-Values=GameDto.Properties
+                              AddItem="@(str => new PropertyDto() { Label = str })" />
             </div>
             <div class="input-game">
                 <div class="label">@ResourcesKey.Tags :</div>
-                <SelectSearch TItem="TagDto" Theme="Theme" GetLabel="@(i => i.Label)"
-                              Items="Categories?.Tags" @bind-Values=GameDto.Tags />
+                <SelectSearch TItem="TagDto" Theme="Theme" GetLabel="@(i => i.Label)" QuickAdd=true
+                              Items="Categories?.Tags" @bind-Values=GameDto.Tags
+                              AddItem="@(str => new TagDto() { Label = str })" />
 
             </div>
             <div class="input-game">
                 <div class="label">@ResourcesKey.Platforms :</div>
-                <SelectSearch TItem="PlatformDto" Theme="Theme" GetLabel="@(i => i.Label)"
-                              Items="Categories?.Platforms" @bind-Values=GameDto.Platforms />
+                <SelectSearch TItem="PlatformDto" Theme="Theme" GetLabel="@(i => i.Label)" QuickAdd=true
+                              Items="Categories?.Platforms" @bind-Values=GameDto.Platforms
+                              AddItem="@(str => new PlatformDto() { Label = str })" />
             </div>
         </div>
     </div>
diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Filter/GameFilter.razor.cs b/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Filter/GameFilter.razor.cs
index b116719..c5f2c1e 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Filter/GameFilter.razor.cs
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Filter/GameFilter.razor.cs
@@ -36,10 +36,10 @@ public partial class GameFilter
         {
             Headers = SortTypes,
             GetHeaderLabel = header => header.Label,
-            DefaultHeader = SortTypes.FirstOrDefault(h => h.SortType == SortType.Ascending),
+            DefaultHeaders = SortTypes.Where(h => h.SortType == SortType.Ascending).ToList(),
             Items = GameProperties,
             GetItemLabel = item => item.Label,
-            DefaultItem = GameProperties.FirstOrDefault(p => p.Label == "Titre")
+            DefaultItems = GameProperties.Where(p => p.Label == "Titre").ToList()
         };
     }
 
diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Header/GameHeader.razor b/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Header/GameHeader.razor
index dd57a3a..2e55110 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Header/GameHeader.razor
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Header/GameHeader.razor
@@ -23,8 +23,7 @@
                     </svg>
                 </div>
                 <Select @ref="SelectListAdd" TItem="KeyValuePair<AddType, string>" THeader="object" 
-                        ValuesChanged=HandleAddTypeClicked Params=SelectParams
-                        Theme="SelectTheme.Navigation">
+                        ValuesChanged=HandleAddTypeClicked Params=SelectParams Theme="SelectTheme.Navigation">
                     <div class="second-button button">
                         <svg class="button-icon" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
                             <path d="M1 3H23L12 22" />
diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Header/GameHeader.razor.cs b/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Header/GameHeader.razor.cs
index d45734a..c742eaa 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Header/GameHeader.razor.cs
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/Games/Header/GameHeader.razor.cs
@@ -28,6 +28,7 @@ public partial class GameHeader : ComponentBase
         {
             Items = AddTypes.ToList(),
             GetItemLabel = item => item.Value,
+            DefaultItems = []
         };
 
         base.OnInitialized();
diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/BackdropFilter/BackdropFilter.razor.css b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/BackdropFilter/BackdropFilter.razor.css
index cb99b96..cc30289 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/BackdropFilter/BackdropFilter.razor.css
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/BackdropFilter/BackdropFilter.razor.css
@@ -1,5 +1,9 @@
 .backdrop-filter {
-    position: fixed;
+    position: absolute;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
     inset: 0;
     z-index: var(--index-backdrop);
 }
diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Popup/Popup.razor.css b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Popup/Popup.razor.css
index 754be81..3983fc4 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Popup/Popup.razor.css
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Popup/Popup.razor.css
@@ -1,16 +1,12 @@
 .popup-wrapper {
     display: none;
-    justify-content: center;
-    align-items: center;
+    justify-self: anchor-center;
+    align-self: anchor-center;
     position: fixed;
-    top: 50%;
-    left: 50%;
-    transform: translate(-50%, -50%);
     z-index: var(--index-popup);
 }
 
 .popup-content {
-    position: relative;
     background-color: var(--dropdown-content);
     padding: 10px;
     border-radius: var(--big-radius);
diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Models/SelectParams.cs b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Models/SelectParams.cs
index f904beb..2fea69c 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Models/SelectParams.cs
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Models/SelectParams.cs
@@ -3,10 +3,11 @@
 public class SelectParams<TItem, THeader>
 {
     public List<TItem> Items { get; set; } = [];
-    public TItem? DefaultItem { get; set; }
+    public List<TItem> DefaultItems { get; set; } = [];
     public Func<TItem, string> GetItemLabel { get; set; } = _ => string.Empty;
     public List<THeader> Headers { get; set; } = [];
-    public THeader? DefaultHeader { get; set; }
+    public List<THeader> DefaultHeaders { get; set; } = [];
     public Func<THeader, string> GetHeaderLabel { get; set; } = _ => string.Empty;
+    public Func<string, TItem>? AddItem { get; set; }
 
 }
diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor
index 77b416d..04bf62a 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor
@@ -14,9 +14,20 @@
         @if (IsContentOpen)
         {
             <div class="content">
+                @if (QuickAdd)
+                {
+                    <div class="add-item">
+                        <EditForm EditContext="QuickAddEditContext" OnSubmit="HandleSubmitAdd">
+                            <input type="text" placeholder="@ResourcesKey.PlaceholderAdd" @bind=AddLabel>
+                        </EditForm>
+                    </div>
+
+                    <span class="line"></span>
+                }
+
                 @if (Params.Headers != null)
                 {
-                    @foreach (var header in Params.Headers)
+                    @foreach (var header in Params.Headers.Union(HeaderValues ?? []))
                     {
                         <SelectRow IsSelected=HeaderValues?.Contains(header)
                                    Label="@Params.GetHeaderLabel(header)" Theme=Theme
@@ -24,14 +35,14 @@
                     }
                 }
 
-                @if (Params.Headers?.Any() == true)
+                @if (Params.Headers?.Count != 0)
                 {
                     <span class="line"></span>
                 }
 
                 @if (Params.Items != null)
                 {
-                    @foreach (var item in Params.Items)
+                    @foreach (var item in Params.Items.Union(Values ?? []))
                     {
                         <SelectRow IsSelected=Values?.Contains(item)
                                    Label="@Params.GetItemLabel(item)" Theme=Theme
diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor.cs b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor.cs
index fe4bc56..c04c27d 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor.cs
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor.cs
@@ -1,5 +1,9 @@
 using GameIdeas.BlazorApp.Shared.Components.Select.Models;
+using GameIdeas.Resources;
+using GameIdeas.Shared.Constants;
 using Microsoft.AspNetCore.Components;
+using Microsoft.AspNetCore.Components.Forms;
+using System.Text.RegularExpressions;
 
 namespace GameIdeas.BlazorApp.Shared.Components.Select;
 
@@ -14,8 +18,11 @@ public partial class Select<TItem, THeader>
     [Parameter] public SelectTheme Theme { get; set; }
     [Parameter] public SelectType Type { get; set; } = SelectType.Single;
     [Parameter] public bool DisableClicked { get; set; } = false;
+    [Parameter] public bool QuickAdd { get; set; } = false;
 
     private bool IsContentOpen = false;
+    private string AddLabel = string.Empty;
+    private EditContext? QuickAddEditContext;
 
     public void Close() =>
         IsContentOpen = false;
@@ -23,6 +30,21 @@ public partial class Select<TItem, THeader>
     public void Open() =>
         IsContentOpen = true;
 
+    protected override void OnInitialized()
+    {
+        QuickAddEditContext = new EditContext(AddLabel);
+
+        if (Params.DefaultItems.Count != 0)
+        {
+            Values.AddRange(Params.DefaultItems);
+        }
+
+        if (Params.DefaultHeaders.Count != 0)
+        {
+            HeaderValues.AddRange(Params.DefaultHeaders);
+        }
+    }
+
     private void HandleButtonClicked()
     {
         if (!DisableClicked)
@@ -32,19 +54,6 @@ public partial class Select<TItem, THeader>
     private void HandleContentClosed() =>
         IsContentOpen = false;
 
-    protected override void OnInitialized()
-    {
-        if (Params.DefaultItem != null)
-        {
-            Values.Add(Params.DefaultItem);
-        }
-
-        if (Params.DefaultHeader != null)
-        {
-            HeaderValues.Add(Params.DefaultHeader);
-        }
-    }
-
     private async Task HandleValueClicked(TItem value)
     {
         if (Type != SelectType.Multiple || Values == null)
@@ -82,4 +91,17 @@ public partial class Select<TItem, THeader>
 
         await HeaderValuesChanged.InvokeAsync(HeaderValues);
     }
+    private async Task HandleSubmitAdd()
+    {
+        if (Regex.IsMatch(AddLabel, GlobalConstants.RegexSelectRow) &&
+            Params.AddItem != null)
+        {
+            Values ??= [];
+            Values.Add(Params.AddItem(AddLabel));
+
+            AddLabel = string.Empty;
+
+            await ValuesChanged.InvokeAsync(Values);
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor.css b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor.css
index 7dce1f0..2f564c1 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor.css
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/Select/Select.razor.css
@@ -29,6 +29,20 @@
     display: none;
 }
 
+.add-item {
+    align-content: center;
+    height: 24px;
+    padding: 0 10px;
+}
+
+.add-item input {
+    width: 100%;
+    color: var(--white);
+    border: none;
+    outline: none;
+    background: transparent;
+}
+
 .dropdown::-webkit-scrollbar {
     width: 10px;
 }
@@ -72,4 +86,16 @@
         border-bottom: 2px solid var(--input-selected);
     }
 
+/***** Sort Theme *****/
+.creation .content {
+    border-radius: var(--small-radius);
+    box-sizing: border-box;
+    border: solid 1px var(--violet);
+}
+
+.creation .content .line {
+    display: block;
+    margin: 2px 6px;
+    border-bottom: 2px solid var(--input-selected);
+}
 
diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/SelectSearch/SelectSearch.razor b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/SelectSearch/SelectSearch.razor
index e169a80..a9e74bb 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/SelectSearch/SelectSearch.razor
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/SelectSearch/SelectSearch.razor
@@ -6,7 +6,7 @@
 @typeparam TItem
 
 <Select @ref=Select TItem="TItem" THeader="string" Theme="Theme" Type="SelectType.Multiple" DisableClicked=true
-        Params="SelectParams" Values=Values ValuesChanged="HandleValuesChanged">
+        Params="SelectParams" Values=Values ValuesChanged="HandleValuesChanged" QuickAdd=QuickAdd>
 
     <div class="@SelectHelper.GetClassFromTheme(Theme)">
         <SearchInput @ref=SearchInput Icon="SearchInputIcon.Dropdown" Placeholder="@Placeholder" 
diff --git a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/SelectSearch/SelectSearch.razor.cs b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/SelectSearch/SelectSearch.razor.cs
index a9d03d7..029f89d 100644
--- a/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/SelectSearch/SelectSearch.razor.cs
+++ b/src/GameIdeas/Client/GameIdeas.BlazorApp/Shared/Components/SelectSearch/SelectSearch.razor.cs
@@ -13,16 +13,20 @@ public partial class SelectSearch<TItem>
     [Parameter] public List<TItem> Values { get; set; } = [];
     [Parameter] public EventCallback<List<TItem>> ValuesChanged { get; set; }
     [Parameter] public string Placeholder { get; set; } = string.Empty;
+    [Parameter] public bool QuickAdd { get; set; } = false;
+    [Parameter] public Func<string, TItem>? AddItem { get; set; }
 
     private SelectParams<TItem, string> SelectParams = new();
     private SearchInput? SearchInput;
     private Select<TItem, string>? Select;
+
     protected override void OnParametersSet()
     {
         SelectParams = new()
         {
             Items = Items,
-            GetItemLabel = GetLabel
+            GetItemLabel = GetLabel,
+            AddItem = AddItem
         };
 
         base.OnParametersSet();
diff --git a/src/GameIdeas/GameIdeas.Resources/CreateStaticResourceKey.cs b/src/GameIdeas/GameIdeas.Resources/CreateStaticResourceKey.cs
index 8f90fac..99316ec 100644
--- a/src/GameIdeas/GameIdeas.Resources/CreateStaticResourceKey.cs
+++ b/src/GameIdeas/GameIdeas.Resources/CreateStaticResourceKey.cs
@@ -34,6 +34,7 @@ public class Translations (TranslationService translationService)
     public string ErrorWhenFetchingData => translationService.Translate(nameof(ErrorWhenFetchingData));
     public string RequestFailedStatusFormat => translationService.Translate(nameof(RequestFailedStatusFormat));
     public string ErrorFetchCategories => translationService.Translate(nameof(ErrorFetchCategories));
+    public string PlaceholderAdd => translationService.Translate(nameof(PlaceholderAdd));
 }
 
 public static class ResourcesKey
@@ -76,4 +77,5 @@ public static class ResourcesKey
     public static string ErrorWhenFetchingData => _instance?.ErrorWhenFetchingData ?? throw new InvalidOperationException("ResourcesKey.ErrorWhenFetchingData is not initialized.");
     public static string RequestFailedStatusFormat => _instance?.RequestFailedStatusFormat ?? throw new InvalidOperationException("ResourcesKey.RequestFailedStatusFormat is not initialized.");
     public static string ErrorFetchCategories => _instance?.ErrorFetchCategories ?? throw new InvalidOperationException("ResourcesKey.ErrorFetchCategories is not initialized.");
+    public static string PlaceholderAdd => _instance?.PlaceholderAdd ?? throw new InvalidOperationException("ResourcesKey.PlaceholderAdd is not initialized.");
 }
\ No newline at end of file
diff --git a/src/GameIdeas/GameIdeas.Shared/Constants/GlobalConstants.cs b/src/GameIdeas/GameIdeas.Shared/Constants/GlobalConstants.cs
index 21d357b..517dbba 100644
--- a/src/GameIdeas/GameIdeas.Shared/Constants/GlobalConstants.cs
+++ b/src/GameIdeas/GameIdeas.Shared/Constants/GlobalConstants.cs
@@ -2,6 +2,5 @@
 
 public class GlobalConstants
 {
-    public const string EnterKeyCode = "Enter";
-    public const string PadEnterKeyCode = "NumpadEnter";
+    public const string RegexSelectRow = @"[a-zA-Z_ \-]*";
 }
diff --git a/src/GameIdeas/Server/GameIdeas.WebAPI/Files/GameIdeas.fr.json b/src/GameIdeas/Server/GameIdeas.WebAPI/Files/GameIdeas.fr.json
index a3ec135..ccdf7c5 100644
--- a/src/GameIdeas/Server/GameIdeas.WebAPI/Files/GameIdeas.fr.json
+++ b/src/GameIdeas/Server/GameIdeas.WebAPI/Files/GameIdeas.fr.json
@@ -29,5 +29,6 @@
     "ErrorWhenDeletingData": "Erreur lors de la requête DELETE",
     "ErrorWhenFetchingData": "Erreur lors de la requête GET",
     "RequestFailedStatusFormat": "Erreur lors de la réponse, code {0}",
-    "ErrorFetchCategories": "Erreur lors de la récupération des catégories"
+    "ErrorFetchCategories": "Erreur lors de la récupération des catégories",
+    "PlaceholderAdd": "Ajouter un nouveau"
 }
\ No newline at end of file