diff --git a/samples/TreeDataGridDemo/ViewModels/CountriesPageViewModel.cs b/samples/TreeDataGridDemo/ViewModels/CountriesPageViewModel.cs
index 2be1344c..5be35f5c 100644
--- a/samples/TreeDataGridDemo/ViewModels/CountriesPageViewModel.cs
+++ b/samples/TreeDataGridDemo/ViewModels/CountriesPageViewModel.cs
@@ -21,14 +21,14 @@ public CountriesPageViewModel()
             {
                 Columns =
                 {
-                    new TextColumn<Country, string>("Country", x => x.Name, (r, v) => r.Name = v, new GridLength(6, GridUnitType.Star), new()
+                    new TextColumn<Country, string>("Country", x => x.Name, (r, v) => r.Name = v, new GridLength(1, GridUnitType.Star), new()
                     {
                         IsTextSearchEnabled = true,
                     }),
                     new TemplateColumn<Country>("Region", "RegionCell", "RegionEditCell"),
-                    new TextColumn<Country, int>("Population", x => x.Population, new GridLength(3, GridUnitType.Star)),
-                    new TextColumn<Country, int>("Area", x => x.Area, new GridLength(3, GridUnitType.Star)),
-                    new TextColumn<Country, int>("GDP", x => x.GDP, new GridLength(3, GridUnitType.Star), new()
+                    new TextColumn<Country, int>("Population", x => x.Population, new GridLength(200, GridUnitType.Auto), new TextColumnOptions<Country>() { MinWidth = new GridLength(300)}),
+                    new TextColumn<Country, int>("Area", x => x.Area, new GridLength(200, GridUnitType.Auto), new TextColumnOptions<Country>() { MinWidth = new GridLength(200)}),
+                    new TextColumn<Country, int>("GDP", x => x.GDP, new GridLength(200, GridUnitType.Auto), new()
                     {
                         TextAlignment = Avalonia.Media.TextAlignment.Right,
                         MaxWidth = new GridLength(150)