diff --git a/IpConnectWizardWindow.xaml b/IpConnectWizardWindow.xaml
index 79993b27e..92ae8f411 100644
--- a/IpConnectWizardWindow.xaml
+++ b/IpConnectWizardWindow.xaml
@@ -1,8 +1,8 @@
 <Window x:Class="ArIED61850Tester.IpConnectWizardWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-        Title="Add IEC 61850 IED" Width="480" MinWidth="460" MaxHeight="390"
-        SizeToContent="Height" WindowStartupLocation="CenterOwner"
+        Title="Add IEC 61850 IED" Width="480" Height="350" MinWidth="480" MaxWidth="480"
+        SizeToContent="Manual" WindowStartupLocation="CenterOwner"
         ResizeMode="NoResize" ShowInTaskbar="False"
         Background="{DynamicResource TaskDialogCanvas}"
         FontFamily="{DynamicResource AppFontFamily}" Icon="Assets/app-icon.ico">
@@ -48,10 +48,10 @@
                         <ControlTemplate TargetType="{x:Type Button}">
                             <Border x:Name="HistoryChrome" Background="{TemplateBinding Background}"
                                     CornerRadius="0,8,8,0">
-                                <Path Data="M 2,5 L 7,10 L 12,5" Width="14" Height="14"
-                                      Stretch="Uniform" Stroke="{StaticResource TaskDialogMuted}"
-                                      StrokeThickness="1.7" StrokeStartLineCap="Round"
-                                      StrokeEndLineCap="Round" StrokeLineJoin="Round"
+                                <!-- Google Material Icons: expand_circle_down (24dp). -->
+                                <Path Data="M12,2 C6.48,2 2,6.48 2,12 C2,17.52 6.48,22 12,22 C17.52,22 22,17.52 22,12 C22,6.48 17.52,2 12,2 Z M12,16.5 L6,10.5 7.41,9.09 12,13.67 16.59,9.09 18,10.5 Z"
+                                      Width="20" Height="20" Stretch="Uniform"
+                                      Fill="{StaticResource TaskDialogMuted}"
                                       HorizontalAlignment="Center" VerticalAlignment="Center"/>
                             </Border>
                             <ControlTemplate.Triggers>
@@ -82,9 +82,12 @@
                                             <Border x:Name="Chrome" CornerRadius="6" Padding="2,5"
                                                     Background="Transparent">
                                                 <StackPanel Orientation="Horizontal">
-                                                    <Path x:Name="AdvancedChevron" Data="M 2,3 L 6,7 L 10,3" Width="12" Height="12"
-                                                          Stretch="Uniform" Stroke="{StaticResource TaskDialogMuted}"
-                                                          StrokeThickness="1.5" StrokeStartLineCap="Round" StrokeEndLineCap="Round"
+                                                    <!-- Same Material circle-chevron as the IP history control. -->
+                                                    <Path x:Name="AdvancedChevron"
+                                                          Data="M12,2 C6.48,2 2,6.48 2,12 C2,17.52 6.48,22 12,22 C17.52,22 22,17.52 22,12 C22,6.48 17.52,2 12,2 Z M12,16.5 L6,10.5 7.41,9.09 12,13.67 16.59,9.09 18,10.5 Z"
+                                                          Width="17" Height="17" Stretch="Uniform"
+                                                          RenderTransformOrigin="0.5,0.5"
+                                                          Fill="{StaticResource TaskDialogMuted}"
                                                           VerticalAlignment="Center"/>
                                                     <TextBlock Text="Advanced settings"
                                                                Margin="8,0,0,0" FontSize="11.5"
@@ -96,7 +99,7 @@
                                                 <Trigger Property="IsChecked" Value="True">
                                                     <Setter TargetName="AdvancedChevron" Property="RenderTransform">
                                                         <Setter.Value>
-                                                            <RotateTransform Angle="180" CenterX="6" CenterY="6"/>
+                                                            <RotateTransform Angle="180"/>
                                                         </Setter.Value>
                                                     </Setter>
                                                 </Trigger>
@@ -146,7 +149,7 @@
                 <TextBlock Text="IP address" FontSize="12" FontWeight="SemiBold"
                            Foreground="{StaticResource TaskDialogInk}" Margin="0,0,0,8"/>
                 <Grid>
-                    <Border x:Name="IpEditorHost" Height="43" CornerRadius="9"
+                    <Border x:Name="IpEditorHost" Width="265" Height="43" HorizontalAlignment="Left" CornerRadius="9"
                             BorderThickness="1" Background="{StaticResource TaskDialogCard}">
                         <Border.Style>
                             <Style TargetType="Border">
@@ -192,7 +195,7 @@
                                     Click="HistoryButton_Click"/>
                         </Grid>
                     </Border>
-                    <TextBox x:Name="RawIpBox" Height="43" Padding="12,7"
+                    <TextBox x:Name="RawIpBox" Width="265" Height="43" HorizontalAlignment="Left" Padding="12,7"
                              VerticalContentAlignment="Center" Visibility="Collapsed"
                              FontSize="13"
                              Foreground="{StaticResource TaskDialogInk}"
@@ -260,31 +263,22 @@
                 <Expander x:Name="MoreOptionsExpander" Margin="0,12,0,0"
                           Style="{StaticResource SmartIpOptionsExpander}"
                           AutomationProperties.Name="Advanced connection settings">
-                    <Grid Margin="2,9,0,0">
-                        <Grid.ColumnDefinitions>
-                            <ColumnDefinition Width="126"/>
-                            <ColumnDefinition Width="*"/>
-                        </Grid.ColumnDefinitions>
-                        <StackPanel>
-                            <TextBlock Text="Port" FontSize="11"
-                                       Foreground="{StaticResource TaskDialogMuted}"
-                                       Margin="0,0,0,5"/>
-                            <TextBox x:Name="MmsPortBox" Width="94" Height="34"
-                                     HorizontalAlignment="Left" Padding="10,5"
+                    <StackPanel Margin="2,9,0,0">
+                        <TextBlock Text="Port" FontSize="11"
+                                   Foreground="{StaticResource TaskDialogMuted}"
+                                   Margin="0,0,0,5"/>
+                        <Border Width="96" Height="36" HorizontalAlignment="Left"
+                                Background="{StaticResource TaskDialogCard}"
+                                BorderBrush="{StaticResource TaskDialogBorder}"
+                                BorderThickness="1" CornerRadius="9">
+                            <TextBox x:Name="MmsPortBox" BorderThickness="0"
+                                     Background="Transparent" Padding="10,5"
                                      FontSize="12" VerticalContentAlignment="Center"
                                      Foreground="{StaticResource TaskDialogInk}"
-                                     Background="{StaticResource TaskDialogCard}"
-                                     BorderBrush="{StaticResource TaskDialogBorder}"
                                      ToolTip="Default port: 102"
                                      Text="{Binding MmsPortText, RelativeSource={RelativeSource AncestorType=Window}, UpdateSourceTrigger=PropertyChanged}"/>
-                        </StackPanel>
-                        <CheckBox x:Name="ManualAddressCheck" Grid.Column="1"
-                                  Content="Use full address" Margin="2,17,0,0"
-                                  VerticalAlignment="Center" FontSize="11.5"
-                                  Foreground="{StaticResource TaskDialogMuted}"
-                                  ToolTip="Use this for other address formats"
-                                  Click="ManualAddressCheck_Click"/>
-                    </Grid>
+                        </Border>
+                    </StackPanel>
                 </Expander>
 
                 <TextBlock x:Name="WizardStatusText" Margin="2,9,0,0"
diff --git a/IpConnectWizardWindow.xaml.cs b/IpConnectWizardWindow.xaml.cs
index 0ffa2216c..6ec671606 100644
--- a/IpConnectWizardWindow.xaml.cs
+++ b/IpConnectWizardWindow.xaml.cs
@@ -36,6 +36,7 @@ public string MmsPortText
     private readonly bool _rememberDiscoveryEndpoint;
     private readonly ICollectionView _historyView;
     private bool _updatingOctets;
+    private bool _rawAddressMode;
     public int MmsPort { get; private set; } = 102;
 
     // UI projection ONLY; UserPreferenceStore remains the sole persistence authority.
@@ -80,7 +81,7 @@ public IpConnectWizardWindow(string initialIp = "", int initialPort = 102,
 
         Loaded += (_, _) =>
         {
-            if (ManualAddressCheck.IsChecked == true) RawIpBox.Focus();
+            if (_rawAddressMode) RawIpBox.Focus();
             else Octet1Box.Focus();
         };
     }
@@ -129,7 +130,7 @@ private void ApplyAddress(string address)
         RelayIpAddress = address;
         if (TrySplitIpv4(address, out var parts))
         {
-            ManualAddressCheck.IsChecked = false;
+            _rawAddressMode = false;
             _updatingOctets = true;
             try
             {
@@ -141,13 +142,13 @@ private void ApplyAddress(string address)
         }
         else if (!string.IsNullOrWhiteSpace(address))
         {
-            ManualAddressCheck.IsChecked = true;
+            _rawAddressMode = true;
             RawIpBox.Text = address;
             SetAddressMode(true);
         }
         else
         {
-            ManualAddressCheck.IsChecked = false;
+            _rawAddressMode = false;
             _updatingOctets = true;
             try { foreach (var box in Octets) box.Clear(); }
             finally { _updatingOctets = false; }
@@ -162,45 +163,12 @@ private void SetAddressMode(bool manual)
         OctetEditor.Visibility = manual ? Visibility.Collapsed : Visibility.Visible;
         HistoryButton.Visibility = manual ? Visibility.Collapsed : Visibility.Visible;
         RawIpBox.Visibility = manual ? Visibility.Visible : Visibility.Collapsed;
-        if (manual)
-            MoreOptionsExpander.IsExpanded = true;
+        _rawAddressMode = manual;
         AddressHintText.Text = manual
             ? "Enter the address exactly as provided."
             : "Example: 192.168.1.10";
     }
 
-    private void ManualAddressCheck_Click(object sender, RoutedEventArgs e)
-    {
-        var manual = ManualAddressCheck.IsChecked == true;
-        if (manual && TryNormalizeIpv4Octets(Octets.Select(b => b.Text).ToArray(), out var ip))
-        {
-            RelayIpAddress = ip;
-            RawIpBox.Text = ip;
-        }
-        else if (!manual && TrySplitIpv4(RawIpBox.Text, out var parts))
-        {
-            _updatingOctets = true;
-            try
-            {
-                var boxes = Octets;
-                for (int i = 0; i < 4; i++) boxes[i].Text = parts[i];
-            }
-            finally { _updatingOctets = false; }
-        }
-        else if (!manual && !string.IsNullOrWhiteSpace(RawIpBox.Text))
-        {
-            // Never silently truncate a valid IPv6 literal into four octets.
-            ManualAddressCheck.IsChecked = true;
-            WizardStatusText.Text = "Keep manual entry enabled for this address format.";
-            return;
-        }
-
-        SetAddressMode(manual);
-        if (manual) RawIpBox.Focus();
-        else Octet1Box.Focus();
-        WizardStatusText.Text = string.Empty;
-    }
-
     private int OctetIndex(TextBox box) => Array.IndexOf(Octets, box);
 
     private void FocusOctet(int index, bool atEnd = false)
@@ -370,7 +338,7 @@ private void CommitHistorySelection()
         if (selection.MmsPort != 102)
             MoreOptionsExpander.IsExpanded = true;
         HistoryPopup.IsOpen = false;
-        if (ManualAddressCheck.IsChecked == true) RawIpBox.Focus();
+        if (_rawAddressMode) RawIpBox.Focus();
         else Octet1Box.Focus();
         // Recalling an endpoint is UI-only. Only Connect_Click submits.
     }
@@ -378,7 +346,7 @@ private void CommitHistorySelection()
     private void Connect_Click(object sender, RoutedEventArgs e)
     {
         string submittedAddress;
-        if (ManualAddressCheck.IsChecked == true)
+        if (_rawAddressMode)
         {
             submittedAddress = RawIpBox.Text.Trim();
             if (!IPAddress.TryParse(submittedAddress, out _))
diff --git a/tests/ARSAS.Tests/IedTaskDialogVisualRegressionTests.cs b/tests/ARSAS.Tests/IedTaskDialogVisualRegressionTests.cs
index c2133356c..741a53cf5 100644
--- a/tests/ARSAS.Tests/IedTaskDialogVisualRegressionTests.cs
+++ b/tests/ARSAS.Tests/IedTaskDialogVisualRegressionTests.cs
@@ -21,11 +21,20 @@ public void BothDialogs_UseIsolatedHighContrastSurfaceAndBoundedNaturalHeight()
             var document = XDocument.Load(Find(file));
             var root = Assert.IsType<XElement>(document.Root);
             Assert.Equal("Window", root.Name.LocalName);
-            Assert.Equal("Height", (string?)root.Attribute("SizeToContent"));
+            Assert.Equal(file == "IpConnectWizardWindow.xaml" ? "Manual" : "Height",
+                (string?)root.Attribute("SizeToContent"));
             Assert.Equal("TaskDialogCanvas", ResourceRef((string?)root.Attribute("Background"), "DynamicResource"));
-            Assert.True(double.TryParse((string?)root.Attribute("MaxHeight"),
-                NumberStyles.Float, CultureInfo.InvariantCulture, out var max) && max <= 700);
-            Assert.Null(root.Attribute("Height"));
+            if (file == "IpConnectWizardWindow.xaml")
+            {
+                Assert.Equal("350", (string?)root.Attribute("Height"));
+                Assert.Equal("CenterOwner", (string?)root.Attribute("WindowStartupLocation"));
+            }
+            else
+            {
+                Assert.True(double.TryParse((string?)root.Attribute("MaxHeight"),
+                    NumberStyles.Float, CultureInfo.InvariantCulture, out var max) && max <= 700);
+                Assert.Null(root.Attribute("Height"));
+            }
             Assert.Contains(root.Descendants(Presentation + "ResourceDictionary"),
                 element => element.Attribute("Source")?.Value == "Styles/IedTaskDialogStyles.xaml");
             Assert.Contains(root.Descendants(Presentation + "ScrollViewer"),
diff --git a/tests/ARSAS.Tests/PremiumSmartIpWizardTests.cs b/tests/ARSAS.Tests/PremiumSmartIpWizardTests.cs
index 2626678d2..d1f4c051f 100644
--- a/tests/ARSAS.Tests/PremiumSmartIpWizardTests.cs
+++ b/tests/ARSAS.Tests/PremiumSmartIpWizardTests.cs
@@ -87,9 +87,9 @@ public void DefaultDialog_IsCompactUsesAppTypography_AndKeepsExpertControlsColla
         var root = Assert.IsType<XElement>(doc.Root);
 
         Assert.InRange(int.Parse(root.Attribute("Width")!.Value), 460, 530);
-        Assert.True(int.Parse(root.Attribute("MaxHeight")!.Value) <= 480);
+        Assert.Equal("350", root.Attribute("Height")?.Value);
         Assert.Contains("AppFontFamily", root.Attribute("FontFamily")!.Value);
-        Assert.Equal("Height", root.Attribute("SizeToContent")?.Value);
+        Assert.Equal("Manual", root.Attribute("SizeToContent")?.Value);
 
         var octetStyle = doc.Descendants(w + "Style")
             .Single(style => style.Attribute(x + "Key")?.Value == "SmartIpOctet");
@@ -104,8 +104,12 @@ public void DefaultDialog_IsCompactUsesAppTypography_AndKeepsExpertControlsColla
         Assert.NotEqual("True", options.Attribute("IsExpanded")?.Value);
         Assert.Contains(options.Descendants(w + "TextBox"),
             box => box.Attribute(x + "Name")?.Value == "MmsPortBox");
-        Assert.Contains(options.Descendants(w + "CheckBox"),
+        Assert.DoesNotContain(doc.Descendants(w + "CheckBox"),
             box => box.Attribute(x + "Name")?.Value == "ManualAddressCheck");
+        Assert.Equal("265", doc.Descendants(w + "Border")
+            .Single(e => e.Attribute(x + "Name")?.Value == "IpEditorHost")
+            .Attribute("Width")?.Value);
+        Assert.Contains("expand_circle_down", File.ReadAllText(Find("IpConnectWizardWindow.xaml")));
 
         var xaml = File.ReadAllText(Find("IpConnectWizardWindow.xaml"));
         Assert.DoesNotContain("Smart discovery", xaml, StringComparison.Ordinal);
@@ -152,19 +156,23 @@ public void WpfEditor_ConstructsOnSta_AndHasReachableKeyboardFocusAndIPv6Mode()
 
                     var options = Assert.IsType<Expander>(wizard.FindName("MoreOptionsExpander"));
                     Assert.False(options.IsExpanded);
-                    var advanced = Assert.IsType<CheckBox>(wizard.FindName("ManualAddressCheck"));
                     var raw = Assert.IsType<TextBox>(wizard.FindName("RawIpBox"));
                     var host = Assert.IsType<Border>(wizard.FindName("IpEditorHost"));
-                    var mode = typeof(IpConnectWizardWindow).GetMethod(
-                        "ManualAddressCheck_Click", BindingFlags.Instance | BindingFlags.NonPublic);
-                    Assert.NotNull(mode);
-                    advanced.IsChecked = true;
-                    mode.Invoke(wizard, [advanced, new RoutedEventArgs()]);
-                    Assert.True(options.IsExpanded);
-                    Assert.Equal(Visibility.Visible, raw.Visibility);
-                    Assert.Equal(Visibility.Collapsed, host.Visibility);
-                    raw.Text = "2001:db8::2";
-                    Assert.True(System.Net.IPAddress.TryParse(raw.Text, out _));
+                    Assert.Equal(Visibility.Collapsed, raw.Visibility);
+                    Assert.Equal(Visibility.Visible, host.Visibility);
+                    Assert.Null(wizard.FindName("ManualAddressCheck"));
+
+                    // IPv6 has no visible toggle; it activates via the caller's
+                    // initial address or a history recall, without losing data.
+                    var ipv6Wizard = new IpConnectWizardWindow("2001:db8::2");
+                    try
+                    {
+                        Assert.Equal(Visibility.Visible,
+                            Assert.IsType<TextBox>(ipv6Wizard.FindName("RawIpBox")).Visibility);
+                        Assert.Equal(Visibility.Collapsed,
+                            Assert.IsType<Border>(ipv6Wizard.FindName("IpEditorHost")).Visibility);
+                    }
+                    finally { ipv6Wizard.Close(); }
 
                     Assert.NotNull(wizard.FindName("HistorySearchBox"));
                     Assert.NotNull(wizard.FindName("HistoryListBox"));
diff --git a/tests/ARSAS.Tests/StartupVisualStabilityRegressionTests.cs b/tests/ARSAS.Tests/StartupVisualStabilityRegressionTests.cs
index 06db77b8d..ee0f54d2c 100644
--- a/tests/ARSAS.Tests/StartupVisualStabilityRegressionTests.cs
+++ b/tests/ARSAS.Tests/StartupVisualStabilityRegressionTests.cs
@@ -71,6 +71,10 @@ public void IpDialog_UsesSingleInputSurfaceAndLowNoiseAdvancedDisclosure()
         var host = doc.Descendants(presentation + "Border")
             .Single(node => node.Attribute(xaml + "Name")?.Value == "IpEditorHost");
         Assert.Equal("43", (string?)host.Attribute("Height"));
+        Assert.Equal("265", (string?)host.Attribute("Width"));
+        Assert.Equal("Manual", (string?)doc.Root.Attribute("SizeToContent"));
+        Assert.Equal("350", (string?)doc.Root.Attribute("Height"));
+        Assert.DoesNotContain("ManualAddressCheck", source, StringComparison.Ordinal);
 
         var editor = doc.Descendants(presentation + "StackPanel")
             .Single(node => node.Attribute(xaml + "Name")?.Value == "OctetEditor");