diff --git a/MultiTerm.Core/ViewModel/ByteDataViewModel.cs b/MultiTerm.Core/ViewModel/ByteDataViewModel.cs
index 3b4334c..4b88986 100644
--- a/MultiTerm.Core/ViewModel/ByteDataViewModel.cs
+++ b/MultiTerm.Core/ViewModel/ByteDataViewModel.cs
@@ -16,7 +16,7 @@ public partial class ByteDataViewModel : ObservableObject, IDataViewModel, IComp
     private int lineIdentifier;
 
     [ObservableProperty]
-    private TimeOnly time;
+    private string timeAsString = String.Empty;
 
     [ObservableProperty]
     private string displayStringChar = String.Empty;
@@ -42,7 +42,7 @@ public partial class ByteDataViewModel : ObservableObject, IDataViewModel, IComp
         this.DisplayStringChar = extendedByte.ToCharacterString();
         this.DisplayStringHex = extendedByte.ToHexString();
         this.DisplayStringBin = extendedByte.ToBinaryString();
-        this.Time = extendedByte.Time;
+        this.TimeAsString = extendedByte.Time.ToString("HH:mm:ss.ffff");
     }
 
     #region IComparable Implementation
@@ -56,9 +56,9 @@ public partial class ByteDataViewModel : ObservableObject, IDataViewModel, IComp
         if(other == null)
             return 1;
 
-        if (other.Time.Ticks > this.Time.Ticks)
+        if (other.Data.Time.Ticks > this.Data.Time.Ticks)
             return -1;
-        else if(this.Time.Ticks > other.Time.Ticks)
+        else if(this.Data.Time.Ticks > other.Data.Time.Ticks)
             return 1;
         else  // equal
             return 0;
diff --git a/MultiTerm.Core/ViewModel/IDataViewModel.cs b/MultiTerm.Core/ViewModel/IDataViewModel.cs
index 50337a9..78e59f6 100644
--- a/MultiTerm.Core/ViewModel/IDataViewModel.cs
+++ b/MultiTerm.Core/ViewModel/IDataViewModel.cs
@@ -11,7 +11,7 @@ public interface IDataViewModel
     /// <summary>
     /// Time when this data was produced.
     /// </summary>    
-    TimeOnly Time { get; }
+    string TimeAsString { get; }
 
     /// <summary>
     /// Hosts a displayable string of the character (.NET: UTF-16 encoded).
diff --git a/MultiTerm.Core/ViewModel/MultiFormatDataViewModel.cs b/MultiTerm.Core/ViewModel/MultiFormatDataViewModel.cs
index 1d9c017..a5758f9 100644
--- a/MultiTerm.Core/ViewModel/MultiFormatDataViewModel.cs
+++ b/MultiTerm.Core/ViewModel/MultiFormatDataViewModel.cs
@@ -120,17 +120,17 @@ public partial class MultiFormatDataViewModel : ObservableObject
 
         if (this.Selected.Count == 1)
         {
-            this.SelectedDataFirstAbsoluteTime = $"Time: {this.Selected.First().Time:HH:mm:ss.ff}";
+            this.SelectedDataFirstAbsoluteTime = $"Time: {this.Selected.First().Data.Time:HH:mm:ss.ffff}";
             this.SelectedDataTimediff = string.Empty;
         }
 
         if (this.Selected.Count > 1)
         {
             TimeSpan timediff;
-            TimeOnly lastSelected = this.Selected.Last().Time, firstSelected = this.Selected.First().Time;
+            TimeOnly lastSelected = this.Selected.Last().Data.Time, firstSelected = this.Selected.First().Data.Time;
 
-            Debug.WriteLine($"First time selected: {firstSelected:HH.mm:ss.ff} Ticks: {firstSelected.Ticks}");
-            Debug.WriteLine($"Last time selected: {lastSelected:HH.mm:ss.ff} Ticks: {lastSelected.Ticks}");
+            Debug.WriteLine($"First time selected: {firstSelected:HH.mm:ss.ffff} Ticks: {firstSelected.Ticks}");
+            Debug.WriteLine($"Last time selected: {lastSelected:HH.mm:ss.ffff} Ticks: {lastSelected.Ticks}");
 
             // calculate timedifference according to selection direction
             // (preventive. selection should arrive sorted correctly)
@@ -145,7 +145,7 @@ public partial class MultiFormatDataViewModel : ObservableObject
 
             Debug.WriteLine($"Calculated timediff Ticks: {timediff.Ticks}");
 
-            this.SelectedDataFirstAbsoluteTime = $"Time (first selected): {firstSelected:HH:mm:ss.ff}";
+            this.SelectedDataFirstAbsoluteTime = $"Time (first selected): {firstSelected:HH:mm:ss.ffff}";
             this.SelectedDataTimediff = $"Difference (first to last): {timediff.TotalMilliseconds:n} ms";
         }
     }
diff --git a/MultiTerm.Wpf.CustomControl/MultiFormatDataView/MultiFormatDataView.xaml b/MultiTerm.Wpf.CustomControl/MultiFormatDataView/MultiFormatDataView.xaml
index c15b344..9b2a530 100644
--- a/MultiTerm.Wpf.CustomControl/MultiFormatDataView/MultiFormatDataView.xaml
+++ b/MultiTerm.Wpf.CustomControl/MultiFormatDataView/MultiFormatDataView.xaml
@@ -31,7 +31,9 @@
 
             <!-- Data Template for Data Container -->
             <DataTemplate x:Key="dataContainerTemplate" DataType="vm:IDataViewModel">
-                <StackPanel Orientation="Vertical" Margin="0" x:Name="ItemStackPanel">
+                <StackPanel Orientation="Vertical" Margin="0" x:Name="ItemStackPanel"
+                            ToolTip="{Binding TimeAsString}"
+                            ToolTipService.InitialShowDelay="500">
                     <StackPanel.Triggers>
                         <EventTrigger SourceName="ItemStackPanel" RoutedEvent="Loaded">
                             <BeginStoryboard>