diff --git a/MainForm.cs b/MainForm.cs
index 1649abb..982c774 100644
--- a/MainForm.cs
+++ b/MainForm.cs
@@ -7,6 +7,7 @@ using System.Collections.Generic;
 using System.ComponentModel;
 using System.Drawing;
 using System.IO;
+using System.Linq;
 using System.Runtime.InteropServices;
 using System.Text.Json;
 using System.Threading.Tasks;
@@ -39,6 +40,7 @@ namespace FizzyLauncher
         {
             InitializeComponent();
 
+            tileContainer1.OnColumnSizeChanged += tileContainer1_OnSizeChanged;
             notifyIcon1.Text = Application.ProductName;
 
             this.AutoScaleMode = AutoScaleMode.None;
@@ -231,15 +233,6 @@ namespace FizzyLauncher
         protected void newSession()
         {
             tileContainer1.Clear(true);
-            //flowLayoutPanel1.Controls.Clear();
-            //flowLayoutPanel1.Controls.Add(new TilePanelLayout(new TileGroupModel()
-            //{
-            //    Title = "New Group",
-            //    IsExpanded = true,
-            //    GridSize = new Size(6, 1)
-            //}));
-
-            InvalidateWidth(6);
         }
 
         protected async Task loadFile(string filename)
@@ -301,23 +294,7 @@ namespace FizzyLauncher
                 }
 
                 // load tiles
-                int maxTileWidth = 0;
-                tileContainer1.Clear();
-
-                if (this.CurrentSession.Groups != null)
-                {
-                    foreach (TileGroupModel item in this.CurrentSession.Groups)
-                    {
-                        maxTileWidth = Math.Max(maxTileWidth, item.GridSize.Width);
-
-                        TilePanelLayout panel = new TilePanelLayout(item);
-
-                        tileContainer1.Add(panel);
-                    }
-                }
-
-                // resize
-                InvalidateSize(maxTileWidth);
+                tileContainer1.Load(this.CurrentSession.Groups);
 
                 // reposition
                 if (!this.CurrentSession.StartPosition.IsEmpty) ThreadControl.SetLocation(this, this.CurrentSession.StartPosition);
@@ -327,6 +304,7 @@ namespace FizzyLauncher
                 ThreadControl.SetVisible(this, true);
                 ThreadControl.SetChecked(enableAnimationsToolStripMenuItem, this.CurrentSession.EnableAnimation);
                 ThreadControl.SetChecked(showBigIconsToolStripMenuItem, this.CurrentSession.EnableBigIconInFolder);
+                ThreadControl.SetClientHeight(this, this.CurrentSession.DefaultHeight);
 
                 ThreadControl.SetFocus(this);
 
@@ -364,14 +342,7 @@ namespace FizzyLauncher
             this.CurrentSession.DefaultHeight = this.Height;
             this.CurrentSession.AlwaysOnTop = this.TopMost;
             this.CurrentSession.StartPosition = this.Location;
-
-            // save
-            this.CurrentSession.Groups = new List<TileGroupModel>();
-
-            foreach (TilePanelLayout item in tileContainer1.Groups)
-            {
-                this.CurrentSession.Groups.Add(item.Model);
-            }
+            this.CurrentSession.Groups = tileContainer1.GroupModels?.ToList() ?? new List<TileGroupModel>();
 
             var options = new JsonSerializerOptions();
             options.Converters.Add(new JsonPointConverter());
@@ -419,28 +390,6 @@ namespace FizzyLauncher
             return false;
         }
 
-
-        protected void InvalidateSize(int columnWidth)
-        {
-            int newWidth = TilePanelLayout.CalcWidth(columnWidth);
-            newWidth += SystemInformation.VerticalScrollBarWidth;
-            newWidth += tileContainer1.CalcWidth;
-            newWidth += this.Padding.Horizontal;
-
-            ThreadControl.ClientSize(this, newWidth, this.CurrentSession.DefaultHeight);
-        }
-
-        protected void InvalidateWidth(int columnWidth)
-        {
-            int newWidth = TilePanelLayout.CalcWidth(columnWidth);
-            newWidth += SystemInformation.VerticalScrollBarWidth;
-            newWidth += tileContainer1.CalcWidth;
-            newWidth += this.Padding.Horizontal;
-
-            ThreadControl.SetClientWidth(this, newWidth);
-        }
-
-
 #region main menu
 
         private void newToolStripMenuItem_Click(object sender, EventArgs e)
@@ -669,9 +618,18 @@ namespace FizzyLauncher
             this.Close();
         }
 
+#endregion
 
+        private void tileContainer1_OnSizeChanged(object sender, EventArgs e)
+        {
+            int newWidth = TilePanelLayout.CalcWidth(tileContainer1.TileWidthCount);
+            newWidth += SystemInformation.VerticalScrollBarWidth;
+            newWidth += tileContainer1.CalcWidth;
+            newWidth += this.Padding.Horizontal;
+
+            ThreadControl.SetClientWidth(this, newWidth);
+        }
 
-        #endregion
 
     }
 }
\ No newline at end of file
diff --git a/RyzStudio/Windows/Forms/ThreadControl.cs b/RyzStudio/Windows/Forms/ThreadControl.cs
index 49220fb..f183a18 100644
--- a/RyzStudio/Windows/Forms/ThreadControl.cs
+++ b/RyzStudio/Windows/Forms/ThreadControl.cs
@@ -399,9 +399,9 @@ namespace RyzStudio.Windows.Forms
             }
         }
 
-        public static void ClientSize(Control control, int width, int height) => ClientSize(control, new Size(width, height));
+        public static void SetClientSize(Control control, int width, int height) => SetClientSize(control, new Size(width, height));
 
-        public static void ClientSize(Control control, Size value)
+        public static void SetClientSize(Control control, Size value)
         {
             if (control.InvokeRequired)
             {
@@ -415,6 +415,20 @@ namespace RyzStudio.Windows.Forms
             }
         }
 
+        public static void SetClientHeight(Control control, int value)
+        {
+            if (control.InvokeRequired)
+            {
+                control.Invoke(new MethodInvoker(() => {
+                    control.ClientSize = new Size(control.ClientSize.Width, value);
+                }));
+            }
+            else
+            {
+                control.ClientSize = new Size(control.ClientSize.Width, value);
+            }
+        }
+
         public static void SetSize(Control control, int width, int height) => SetSize(control, new Size(width, height));
 
         public static void SetSize(Control control, Size value)
diff --git a/Windows/Forms/TileContainer.cs b/Windows/Forms/TileContainer.cs
index f3e0090..30a78df 100644
--- a/Windows/Forms/TileContainer.cs
+++ b/Windows/Forms/TileContainer.cs
@@ -2,6 +2,7 @@
 using RyzStudio.Windows.Forms;
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Drawing;
 using System.Linq;
 using System.Text;
@@ -12,6 +13,8 @@ namespace FizzyLauncher.Windows.Forms
 {
     public class TileContainer : Panel
     {
+        protected const int DEFAULT_COLUMN = 6;
+
         protected FlowLayoutPanel flowLayoutPanel1 = null;
 
 
@@ -38,6 +41,10 @@ namespace FizzyLauncher.Windows.Forms
         }
 
 
+        [Browsable(false)]
+        public event EventHandler OnColumnSizeChanged;
+
+
         public int CalcWidth
         {
             get => flowLayoutPanel1.Padding.Horizontal + flowLayoutPanel1.Margin.Horizontal + this.Left + this.Padding.Horizontal + this.Margin.Horizontal;
@@ -65,25 +72,76 @@ namespace FizzyLauncher.Windows.Forms
             }
         }
 
+        public IEnumerable<TileGroupModel> GroupModels
+        {
+            get
+            {
+                foreach (TilePanelLayout item in this.Groups)
+                {
+                    yield return item.Model;
+                }
+            }
+        }
+
+        public int TileWidthCount { get; private set; } = DEFAULT_COLUMN;
+
 
         public void Add(TilePanelLayout tilePanelLayout)
         {
             ThreadControl.Add(flowLayoutPanel1, tilePanelLayout);
         }
 
+        public void Add()
+        {
+            ThreadControl.Add(flowLayoutPanel1, new TilePanelLayout(new TileGroupModel()
+            {
+                Title = "New Group",
+                IsExpanded = true,
+                GridSize = new Size(6, 1)
+            }));
+
+            this.TileWidthCount = Math.Max(this.TileWidthCount, 6);
+        }
+
         public void Clear(bool addDefault = false)
         {
             ThreadControl.Clear(flowLayoutPanel1);
 
+            this.TileWidthCount = DEFAULT_COLUMN;
+
             if (addDefault)
             {
-                flowLayoutPanel1.Controls.Add(new TilePanelLayout(new TileGroupModel()
-                {
-                    Title = "New Group",
-                    IsExpanded = true,
-                    GridSize = new Size(6, 1)
-                }));
+                this.Add();
             }
+
+            ColumnSizeChanged();
+        }
+
+        public void Load(List<TileGroupModel> groupList)
+        {
+            this.Clear();
+
+            if (groupList == null)
+            {
+                return;
+            }
+
+            foreach (TileGroupModel item in groupList)
+            {
+                this.TileWidthCount = Math.Max(this.TileWidthCount, item.GridSize.Width);
+
+                TilePanelLayout panel = new TilePanelLayout(item);
+
+                this.Add(panel);
+            }
+
+            ColumnSizeChanged();
+        }
+
+
+        protected void ColumnSizeChanged()
+        {
+            this.OnColumnSizeChanged?.Invoke(this, null);
         }