diff --git a/IoListTestingWindow.ClockSyncUx.cs b/IoListTestingWindow.ClockSyncUx.cs
index 2ca060789..7b265d1a2 100644
--- a/IoListTestingWindow.ClockSyncUx.cs
+++ b/IoListTestingWindow.ClockSyncUx.cs
@@ -40,9 +40,9 @@ private void ClockSyncUx_Loaded(object sender, RoutedEventArgs e)
 Margin = new Thickness(0, 0, 8, 0),
 Padding = new Thickness(2, 0, 2, 0),
 FontSize = 11.2,
- FontWeight = FontWeights.SemiBold,
+ FontWeight = FontWeights.Medium,
 Foreground = TryFindResource("Ink") as Brush ?? Brushes.DimGray,
- Text = "Global SNTP",
+ Text = "SNTP · —",
 ToolTip = "Global SNTP is controlled from the ARSAS header. It is not owned by FAT and continues running when the FAT window closes while the global server toggle remains enabled."
 };
 
@@ -54,7 +54,7 @@ private void ClockSyncUx_Loaded(object sender, RoutedEventArgs e)
 FontSize = 10.4,
 FontWeight = FontWeights.Medium,
 Foreground = TryFindResource("MutedInk") as Brush ?? Brushes.SlateGray,
- Text = "SNTP: waiting"
+ Text = "Clock · waiting"
 };
 
 _clockSyncGlobalStatusText = globalStatus;
@@ -104,25 +104,22 @@ private void RefreshClockSyncEvidence(SntpClockServiceSnapshot snapshot)
 SntpClockTransportMode.UdpSocket => "UDP",
 _ => "—"
 };
- var localAddress = snapshot.Binding?.LocalAddress.ToString();
 
- _clockSyncGlobalStatusText.Text = !enabled
- ? "Global SNTP · Off"
- : snapshot.State == SntpClockServiceState.Serving
- ? $"Global SNTP · {localAddress ?? "Active"}"
- : "Global SNTP · Enabled";
+ _clockSyncGlobalStatusText.Text = enabled
+ ? "SNTP · ON"
+ : "SNTP · OFF";
 
 _clockSyncEvidenceText.Text = !enabled
- ? "SNTP: off"
+ ? "Clock · idle"
 : snapshot.State switch
 {
 SntpClockServiceState.Serving =>
- $"{transport} · B {snapshot.BroadcastCount} · Req {snapshot.ClientRequestCount} · Reply {snapshot.ReplyCount} · sync not proven",
- SntpClockServiceState.Starting => "SNTP: starting...",
- SntpClockServiceState.Stopped => "SNTP: waiting for connected IED",
- SntpClockServiceState.PortUnavailable => "SNTP: unavailable",
- SntpClockServiceState.Faulted => "SNTP: fault",
- _ => $"SNTP: {snapshot.State}"
+ $"{transport} · B {snapshot.BroadcastCount} · Req {snapshot.ClientRequestCount} · Rep {snapshot.ReplyCount}",
+ SntpClockServiceState.Starting => "Clock · starting...",
+ SntpClockServiceState.Stopped => "Clock · waiting",
+ SntpClockServiceState.PortUnavailable => "Clock · unavailable",
+ SntpClockServiceState.Faulted => "Clock · fault",
+ _ => $"Clock · {snapshot.State}"
 };
 
 var toolTip = BuildClockSyncEvidenceToolTip(snapshot, transport, enabled);
@@ -164,4 +161,4 @@ private void ClockSyncUx_Closed(object? sender, EventArgs e)
 _clockSyncSnapshotOwner.ClockSyncSnapshotChanged -= ClockSyncSnapshotChanged;
 _clockSyncSnapshotOwner = null;
 }
-}
+}
\ No newline at end of file
diff --git a/IoListTestingWindow.P0BenchUx.cs b/IoListTestingWindow.P0BenchUx.cs
index 04d69babc..788f8420c 100644
--- a/IoListTestingWindow.P0BenchUx.cs
+++ b/IoListTestingWindow.P0BenchUx.cs
@@ -58,6 +58,7 @@ private void ApplyP0BenchUx()
 {
 ConfigureP0StableFatColumns();
 ConfigureP0AdaptiveHeaderActions();
+ ConfigureP2CompactHeader();
 }
 
 private void ConfigureP0StableFatColumns()
@@ -206,4 +207,4 @@ public object Convert(object value, Type targetType, object parameter, CultureIn
 
 public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
 => Binding.DoNothing;
-}
+}
\ No newline at end of file
diff --git a/IoListTestingWindow.P2CompactHeader.cs b/IoListTestingWindow.P2CompactHeader.cs
new file mode 100644
index 000000000..9d899819c
--- /dev/null
+++ b/IoListTestingWindow.P2CompactHeader.cs
@@ -0,0 +1,67 @@
+using System.Windows;
+using System.Windows.Controls;
+
+namespace ArIED61850Tester;
+
+/// <summary>
+/// P2 bench-facing header compaction.
+///
+/// P0 already separates operational actions from evidence/status actions. P2 only tightens
+/// that existing hierarchy so the FAT header remains readable on normal engineering laptop
+/// widths. Full evidence detail stays in the existing tooltips; protocol, evidence and grid
+/// behavior are intentionally untouched.
+/// </summary>
+public partial class IoListTestingWindow
+{
+ private void ConfigureP2CompactHeader()
+ {
+ if (_p0PrimaryHeaderActions == null &#124;&#124; _p0SecondaryHeaderActions == null)
+ return;
+
+ _p0PrimaryHeaderActions.Margin = new Thickness(0);
+ _p0SecondaryHeaderActions.Margin = new Thickness(0, 3, 0, 0);
+
+ foreach (var button in _p0PrimaryHeaderActions.Children.OfType<button>())
+ ApplyP2CompactButtonMetrics(button, secondary: false);
+
+ foreach (var button in _p0SecondaryHeaderActions.Children.OfType<button>())
+ ApplyP2CompactButtonMetrics(button, secondary: true);
+
+ WorkspacePreviewToggle.Content = "Preview";
+ if (_cleanSessionButton != null)
+ _cleanSessionButton.Content = "Clean FAT";
+
+ ApplyP2CompactStatusMetrics(_clockSyncGlobalStatusText, 118, FontWeights.Medium);
+ ApplyP2CompactStatusMetrics(_clockSyncEvidenceText, 188, FontWeights.Normal);
+ }
+
+ private static void ApplyP2CompactButtonMetrics(Button button, bool secondary)
+ {
+ button.Padding = secondary
+ ? new Thickness(8, 5, 8, 5)
+ : new Thickness(9, 6, 9, 6);
+ button.Margin = new Thickness(0, 0, 5, 0);
+ button.MinWidth = 0;
+ button.MinHeight = secondary ? 27 : 29;
+ if (secondary)
+ {
+ button.FontSize = 10.4;
+ button.FontWeight = FontWeights.Medium;
+ }
+ }
+
+ private static void ApplyP2CompactStatusMetrics(
+ TextBlock? text,
+ double maxWidth,
+ FontWeight fontWeight)
+ {
+ if (text == null)
+ return;
+
+ text.MaxWidth = maxWidth;
+ text.TextWrapping = TextWrapping.NoWrap;
+ text.TextTrimming = TextTrimming.CharacterEllipsis;
+ text.FontWeight = fontWeight;
+ text.FontSize = 10.2;
+ }
+}
\ No newline at end of file
diff --git a/IoListTestingWindow.SupplementalEvidence.cs b/IoListTestingWindow.SupplementalEvidence.cs
index 0874287b5..49ed7d89c 100644
--- a/IoListTestingWindow.SupplementalEvidence.cs
+++ b/IoListTestingWindow.SupplementalEvidence.cs
@@ -36,13 +36,13 @@ private void InstallSupplementalEvidenceControls()
 if (_comtradeEvidenceButton != null &#124;&#124; WorkspacePreviewToggle.Parent is not Panel actionPanel)
 return;
 
- _timeSyncEvidenceButton = CreateEvidenceButton("Time Sync · —", RefreshTimeSyncEvidence_Click);
+ _timeSyncEvidenceButton = CreateEvidenceButton("Sync · —", RefreshTimeSyncEvidence_Click);
 _timeSyncEvidenceButton.ToolTip = "Capture IEC 61850 time-synchronization evidence for the selected IED";
 
 _comtradeEvidenceButton = CreateEvidenceButton("COMTRADE · —", OpenComtradeEvidence_Click);
 _comtradeEvidenceButton.ToolTip = "Browse relay fault records. A remote COMTRADE listing is sufficient File Service FAT evidence; download is optional.";
 
- _cleanSessionButton = CreateEvidenceButton("New Clean FAT", NewCleanFatSession_Click);
+ _cleanSessionButton = CreateEvidenceButton("Clean FAT", NewCleanFatSession_Click);
 _cleanSessionButton.ToolTip = "Archive all current FAT evidence and reset the project to a zero-evidence retest session";
 
 var insertionIndex = actionPanel.Children.IndexOf(WorkspacePreviewToggle) + 1;
@@ -57,9 +57,9 @@ private Button CreateEvidenceButton(string content, RoutedEventHandler handler)
 var button = new Button
 {
 Content = content,
- Padding = new Thickness(10, 8, 10, 8),
+ Padding = new Thickness(8, 6, 8, 6),
 Margin = new Thickness(0, 0, 6, 0),
- MinWidth = 92
+ MinWidth = 0
 };
 if (TryFindResource("SoftButton") is Style style)
 button.Style = style;
@@ -75,7 +75,7 @@ private void RefreshSupplementalEvidenceControls()
 var ied = SelectedIed;
 if (ied == null)
 {
- _timeSyncEvidenceButton.Content = "Time Sync · —";
+ _timeSyncEvidenceButton.Content = "Sync · —";
 _timeSyncEvidenceButton.ToolTip = "Select an IED first";
 _comtradeEvidenceButton.Content = "COMTRADE · —";
 _comtradeEvidenceButton.ToolTip = "Select an IED first";
@@ -87,8 +87,8 @@ private void RefreshSupplementalEvidenceControls()
 ied.IedName,
 IoFatSupplementalEvidenceService.TimeSyncKind);
 _timeSyncEvidenceButton.Content = timeSync == null
- ? "Time Sync · —"
- : $"Time Sync · {timeSync.Verdict}";
+ ? "Sync · —"
+ : $"Sync · {timeSync.Verdict}";
 _timeSyncEvidenceButton.ToolTip = timeSync == null
 ? "No time-sync evidence captured yet. It will be captured automatically after FAT connection."
 : $"{timeSync.DisplayText}\n{timeSync.Reason}\nCaptured {timeSync.RecordedAtUtc.ToLocalTime():yyyy-MM-dd HH:mm:ss}";
@@ -288,4 +288,4 @@ private static bool HasLiveValue(string? value)
 !text.Equals("Unknown", StringComparison.OrdinalIgnoreCase) &&
 !text.Contains("not probed", StringComparison.OrdinalIgnoreCase);
 }
-}
+}
\ No newline at end of file
diff --git a/tests/ARSAS.Tests/IoFatP2CompactHeaderRegressionTests.cs b/tests/ARSAS.Tests/IoFatP2CompactHeaderRegressionTests.cs
new file mode 100644
index 000000000..dd25879c0
--- /dev/null
+++ b/tests/ARSAS.Tests/IoFatP2CompactHeaderRegressionTests.cs
@@ -0,0 +1,82 @@
+namespace ARSAS.Tests;
+
+public sealed class IoFatP2CompactHeaderRegressionTests
+{
+ [Fact]
+ public void P2_ReusesP0PrimaryAndSecondaryHeaderHierarchy()
+ {
+ var p0 = File.ReadAllText(FindRepoFile("IoListTestingWindow.P0BenchUx.cs"));
+
+ Assert.Contains("ConfigureP0AdaptiveHeaderActions();", p0, StringComparison.Ordinal);
+ Assert.Contains("ConfigureP2CompactHeader();", p0, StringComparison.Ordinal);
+ Assert.Contains("_p0PrimaryHeaderActions", p0, StringComparison.Ordinal);
+ Assert.Contains("_p0SecondaryHeaderActions", p0, StringComparison.Ordinal);
+ Assert.Contains("ReferenceEquals(element, WorkspacePreviewToggle)", p0, StringComparison.Ordinal);
+ Assert.Contains("ReferenceEquals(element, _timeSyncEvidenceButton)", p0, StringComparison.Ordinal);
+ Assert.Contains("ReferenceEquals(element, _comtradeEvidenceButton)", p0, StringComparison.Ordinal);
+ Assert.Contains("ReferenceEquals(element, _cleanSessionButton)", p0, StringComparison.Ordinal);
+ Assert.Contains("ReferenceEquals(element, _clockSyncGlobalStatusText)", p0, StringComparison.Ordinal);
+ Assert.Contains("ReferenceEquals(element, _clockSyncEvidenceText)", p0, StringComparison.Ordinal);
+ }
+
+ [Fact]
+ public void P2_CompactsSecondaryControlsWithoutHidingEvidenceDetail()
+ {
+ var header = File.ReadAllText(FindRepoFile("IoListTestingWindow.P2CompactHeader.cs"));
+ var clock = File.ReadAllText(FindRepoFile("IoListTestingWindow.ClockSyncUx.cs"));
+ var supplemental = File.ReadAllText(FindRepoFile("IoListTestingWindow.SupplementalEvidence.cs"));
+
+ Assert.Contains("WorkspacePreviewToggle.Content = \"Preview\";", header, StringComparison.Ordinal);
+ Assert.Contains("_cleanSessionButton.Content = \"Clean FAT\";", header, StringComparison.Ordinal);
+ Assert.Contains("TextTrimming.CharacterEllipsis", header, StringComparison.Ordinal);
+ Assert.Contains("button.MinWidth = 0;", header, StringComparison.Ordinal);
+
+ Assert.Contains("Text = \"SNTP · —\"", clock, StringComparison.Ordinal);
+ Assert.Contains("\"SNTP · ON\"", clock, StringComparison.Ordinal);
+ Assert.Contains("\"SNTP · OFF\"", clock, StringComparison.Ordinal);
+ Assert.Contains("Rep {snapshot.ReplyCount}", clock, StringComparison.Ordinal);
+ Assert.Contains("BuildClockSyncEvidenceToolTip", clock, StringComparison.Ordinal);
+ Assert.Contains("Binding: {binding}", clock, StringComparison.Ordinal);
+ Assert.Contains("Client request seen: {snapshot.ClientRequestCount}", clock, StringComparison.Ordinal);
+ Assert.Contains("Mode 4 reply sent: {snapshot.ReplyCount}", clock, StringComparison.Ordinal);
+
+ Assert.Contains("CreateEvidenceButton(\"Sync · —\"", supplemental, StringComparison.Ordinal);
+ Assert.Contains("CreateEvidenceButton(\"Clean FAT\"", supplemental, StringComparison.Ordinal);
+ Assert.Contains("$\"Sync · {timeSync.Verdict}\"", supplemental, StringComparison.Ordinal);
+ Assert.Contains("timeSync.DisplayText", supplemental, StringComparison.Ordinal);
+ Assert.Contains("timeSync.Reason", supplemental, StringComparison.Ordinal);
+ Assert.Contains("ied.LatestComtradeRemotePath", supplemental, StringComparison.Ordinal);
+ }
+
+ [Fact]
+ public void P2_IsPresentationOnlyAndDoesNotTouchFatProtocolEvidenceOrGridSchema()
+ {
+ var header = File.ReadAllText(FindRepoFile("IoListTestingWindow.P2CompactHeader.cs"));
+
+ Assert.DoesNotContain("SetVirtualizationMode", header, StringComparison.Ordinal);
+ Assert.DoesNotContain("SetIsVirtualizing", header, StringComparison.Ordinal);
+ Assert.DoesNotContain("ReadObject", header, StringComparison.Ordinal);
+ Assert.DoesNotContain("ReadAsync", header, StringComparison.Ordinal);
+ Assert.DoesNotContain("CaptureCurrentEvidence", header, StringComparison.Ordinal);
+ Assert.DoesNotContain("ScheduleSave", header, StringComparison.Ordinal);
+ Assert.DoesNotContain("ARIEC61850", header, StringComparison.OrdinalIgnoreCase);
+ Assert.DoesNotContain("grid.Columns", header, StringComparison.Ordinal);
+ Assert.DoesNotContain("ON RELAY TIME", header, StringComparison.Ordinal);
+ Assert.DoesNotContain("OFF RELAY TIME", header, StringComparison.Ordinal);
+ }
+
+ private static string FindRepoFile(string relativePath)
+ {
+ DirectoryInfo? directory = new(AppContext.BaseDirectory);
+ while (directory != null)
+ {
+ var candidate = Path.Combine(directory.FullName, relativePath);
+ if (File.Exists(candidate))
+ return candidate;
+ directory = directory.Parent;
+ }
+
+ throw new FileNotFoundException(
+ $"Could not locate repository file '{relativePath}' from '{AppContext.BaseDirectory}'.");
+ }
+}
\ No newline at end of file
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