diff --git a/src/modules/Elsa.Studio.Workflows.Core/Domain/Contracts/IWorkflowDefinitionService.cs b/src/modules/Elsa.Studio.Workflows.Core/Domain/Contracts/IWorkflowDefinitionService.cs
index d22555f8..dfe274d1 100644
--- a/src/modules/Elsa.Studio.Workflows.Core/Domain/Contracts/IWorkflowDefinitionService.cs
+++ b/src/modules/Elsa.Studio.Workflows.Core/Domain/Contracts/IWorkflowDefinitionService.cs
@@ -31,7 +31,7 @@ public interface IWorkflowDefinitionService
     /// <summary>
     /// Finds all workflow definitions by their IDs.
     /// </summary>
-    Task<IEnumerable<WorkflowDefinition>> FindManyByIdAsync(IEnumerable<string> ids, CancellationToken cancellationToken = default);
+    Task<IEnumerable<WorkflowDefinition>> FindManyByIdAsync(IEnumerable<string> ids, bool includeCompositeRoot = false, CancellationToken cancellationToken = default);
     
     /// <summary>
     /// Saves a workflow definition.
diff --git a/src/modules/Elsa.Studio.Workflows.Core/Domain/Services/RemoteWorkflowDefinitionService.cs b/src/modules/Elsa.Studio.Workflows.Core/Domain/Services/RemoteWorkflowDefinitionService.cs
index e9de8370..8cc2c980 100644
--- a/src/modules/Elsa.Studio.Workflows.Core/Domain/Services/RemoteWorkflowDefinitionService.cs
+++ b/src/modules/Elsa.Studio.Workflows.Core/Domain/Services/RemoteWorkflowDefinitionService.cs
@@ -57,10 +57,10 @@ public async Task<PagedListResponse<WorkflowDefinitionSummary>> ListAsync(ListWo
     }
 
     /// <inheritdoc />
-    public async Task<IEnumerable<WorkflowDefinition>> FindManyByIdAsync(IEnumerable<string> ids, CancellationToken cancellationToken = default)
+    public async Task<IEnumerable<WorkflowDefinition>> FindManyByIdAsync(IEnumerable<string> ids, bool includeCompositeRoot = false, CancellationToken cancellationToken = default)
     {
         var api = await GetApiAsync(cancellationToken);
-        var response = await api.GetManyByIdAsync(ids.ToList(), true, cancellationToken);
+        var response = await api.GetManyByIdAsync(ids.ToList(), includeCompositeRoot, cancellationToken);
         return response.Items;
     }
 
diff --git a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDesigner.razor b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDesigner.razor
index f22cee9e..5c581efe 100644
--- a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDesigner.razor
+++ b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDesigner.razor
@@ -10,7 +10,7 @@
                     <MudTooltip Text="Edit Workflow Definition">
                         <MudIconButton
                             Icon="@Icons.Material.Outlined.EditNote"
-                            OnClick="@(() => OnEditClicked(WorkflowDefinition.DefinitionId))">
+                            OnClick="@(() => OnEditClicked())">
                         </MudIconButton>
                     </MudTooltip>
                     <ElapsedTime StartTime="WorkflowInstance.CreatedAt" EndTime="@(WorkflowInstance.Status == WorkflowStatus.Running ? DateTimeOffset.UtcNow : WorkflowInstance.FinishedAt ?? DateTimeOffset.UtcNow)"/>
diff --git a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDesigner.razor.cs b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDesigner.razor.cs
index d0b78f72..08642575 100644
--- a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDesigner.razor.cs
+++ b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDesigner.razor.cs
@@ -1,3 +1,4 @@
+using System.Text.Json;
 using System.Text.Json.Nodes;
 using Elsa.Api.Client.Extensions;
 using Elsa.Api.Client.Resources.ActivityDescriptors.Models;
@@ -71,6 +72,12 @@ public partial class WorkflowInstanceDesigner : IAsyncDisposable
     /// </summary>
     [Parameter] public EventCallback<string> EditWorkflowDefinition { get; set; }
 
+    /// <summary>
+    /// Gets or sets the current selected sub-workflow.
+    /// </summary>
+    [Parameter]
+    public JsonObject? SelectedSubWorkflow { get; set; } = default!;
+
     [Inject] private IActivityRegistry ActivityRegistry { get; set; } = default!;
     [Inject] private IDiagramDesignerService DiagramDesignerService { get; set; } = default!;
     [Inject] private IDomAccessor DomAccessor { get; set; } = default!;
@@ -100,6 +107,16 @@ private RadzenSplitterPane ActivityPropertiesPane
     private MudTabs PropertyTabs { get; set; } = default!;
     private MudTabPanel EventsTabPanel { get; set; } = default!;
 
+    /// <summary>
+    /// Updates the selected sub-workflow.
+    /// </summary>
+    /// <param name="obj"></param>
+    public void UpdateSubWorkflow(JsonObject? obj)
+    {
+        SelectedSubWorkflow = obj;
+        StateHasChanged();
+    }
+
     /// <inheritdoc />
     protected override async Task OnInitializedAsync()
     {
@@ -254,8 +271,24 @@ private async Task OnResize(RadzenSplitterResizeEventArgs arg)
         await UpdatePropertiesPaneHeightAsync();
     }
 
-    private Task OnEditClicked(string definitionId)
+    private Task OnEditClicked()
     {
+        var definitionId = WorkflowDefinition!.DefinitionId;
+
+        if (SelectedSubWorkflow != null)
+        {
+            var typeName = SelectedSubWorkflow.GetTypeName();
+            var version = SelectedSubWorkflow.GetVersion();
+            var descriptor = ActivityRegistry.Find(typeName, version);
+            var isWorkflowActivity = descriptor != null &&
+                                     descriptor.CustomProperties.TryGetValue("RootType", out var rootTypeNameElement) &&
+                                     ((JsonElement)rootTypeNameElement).GetString() == "WorkflowDefinitionActivity";
+            if (isWorkflowActivity)
+            {
+                definitionId = SelectedSubWorkflow.GetWorkflowDefinitionId();
+            }
+        }
+
         var editWorkflowDefinition = this.EditWorkflowDefinition;
 
         if (editWorkflowDefinition.HasDelegate)
diff --git a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDetails.razor b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDetails.razor
index 9c6c0c31..c7a35e58 100644
--- a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDetails.razor
+++ b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDetails.razor
@@ -24,32 +24,64 @@
         </MudTabPanel>
         <MudTabPanel Text="Variables">
             <Well>
-                <MudTable
-                    T="Variable"
-                    Items="WorkflowDefinition.Variables">
-                    <HeaderContent>
-                        <MudTh>Name</MudTh>
-                        <MudTh>Type</MudTh>
-                        <MudTh>Storage</MudTh>
-                        <MudTh>Value</MudTh>
-                    </HeaderContent>
-                    <RowTemplate>
-                        <MudTd>@context.Name</MudTd>
-                        <MudTd>@context.GetTypeDisplayName()</MudTd>
-                        <MudTd>@GetStorageDriverDisplayName(context.StorageDriverTypeName)</MudTd>
-                        <MudTd>@GetVariableValue(context)</MudTd>
-                    </RowTemplate>
-                    <NoRecordsContent>
+                <div>
+                    @if (WorkflowVariableData.Any())
+                    {
+                        <DataPanel Data="WorkflowVariableData" HideEmptyValues="false"/>
+                    }
+                    else
+                    {
                         <Well>
                             No variables
                         </Well>
-                    </NoRecordsContent>
-                </MudTable>
+                    }
+                </div>
             </Well>
         </MudTabPanel>
         <MudTabPanel Text="Input/output">
             <Well>
-                <MudAlert Variant="Variant.Outlined">Input output</MudAlert>
+                <div>
+                    <MudText Typo="Typo.overline" GutterBottom="true" Align="Align.Left">Inputs</MudText>
+                    @if (WorkflowInputData.Any())
+                    {
+                        <DataPanel Data="WorkflowInputData" HideEmptyValues="false"/>
+                    }
+                    else
+                    {
+                        <Well>
+                            No inputs
+                        </Well>
+                    }
+                </div>
+                <div>
+                    <MudText Typo="Typo.overline" GutterBottom="true" Align="Align.Left">Outputs</MudText>
+                    @if (WorkflowOutputData.Any())
+                    {
+                        <DataPanel Data="WorkflowOutputData" HideEmptyValues="false"/>
+                    }
+                    else
+                    {
+                        <Well>
+                            No outputs
+                        </Well>
+                    }
+                </div>
+            </Well>
+            <Well>
+                @if (SubWorkflowInputData.Any())
+                {
+                    <div>
+                        <MudText Typo="Typo.overline" GutterBottom="true" Align="Align.Left">Sub-Workflow Inputs</MudText>
+                        <DataPanel Data="SubWorkflowInputData" HideEmptyValues="false"/>
+                    </div>
+                }
+                @if (SubWorkflowOutputData.Any())
+                {
+                    <div>
+                        <MudText Typo="Typo.overline" GutterBottom="true" Align="Align.Left">Sub-Workflow Outputs</MudText>
+                        <DataPanel Data="SubWorkflowOutputData" HideEmptyValues="false"/>
+                    </div>
+                }
             </Well>
         </MudTabPanel>
     </MudTabs>
diff --git a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDetails.razor.cs b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDetails.razor.cs
index 8e49f264..713a44de 100644
--- a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDetails.razor.cs
+++ b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceDetails.razor.cs
@@ -1,6 +1,7 @@
 using System.Text.Json;
 using System.Text.Json.Nodes;
 using Elsa.Api.Client.Extensions;
+using Elsa.Api.Client.Resources.ActivityExecutions.Models;
 using Elsa.Api.Client.Resources.StorageDrivers.Models;
 using Elsa.Api.Client.Resources.WorkflowDefinitions.Models;
 using Elsa.Api.Client.Resources.WorkflowInstances.Enums;
@@ -39,10 +40,17 @@ public partial class WorkflowInstanceDetails
     [Parameter]
     public JsonObject? SelectedSubWorkflow { get; set; } = default!;
 
+    /// <summary>
+    /// Gets or sets the current selected sub-workflow executions.
+    /// </summary>
+    [Parameter]
+    public ICollection<ActivityExecutionRecord>? SelectedSubWorkflowExecutions { get; set; } = default!;
+
     [Inject] private IStorageDriverService StorageDriverService { get; set; } = default!;
     [Inject] private IWorkflowInstanceObserverFactory WorkflowInstanceObserverFactory { get; set; } = default!;
     [Inject] private IWorkflowInstanceService WorkflowInstanceService { get; set; } = default!;
     [Inject] private IActivityRegistry ActivityRegistry { get; set; } = default!;
+    [Inject] private IActivityExecutionService ActivityExecutionService { get; set; } = default!;
 
     private IDictionary<string, StorageDriverDescriptor> StorageDriverLookup { get; set; } =
         new Dictionary<string, StorageDriverDescriptor>();
@@ -74,21 +82,59 @@ public partial class WorkflowInstanceDetails
         }
     }
 
+    private Dictionary<string, DataPanelItem> WorkflowVariableData
+    {
+        get
+        {
+            if (WorkflowDefinition == null)
+                return new Dictionary<string, DataPanelItem>();
+
+            return WorkflowDefinition.Variables.ToDictionary(entry => entry.Name,
+                entry => new DataPanelItem(@GetVariableValue(entry)));
+        }
+    }
+
+    private Dictionary<string, DataPanelItem> WorkflowInputData
+    {
+        get
+        {
+            if (_workflowInstance == null)
+                return new Dictionary<string, DataPanelItem>();
+
+            return _workflowInstance.WorkflowState.Input.ToDictionary(entry => entry.Key,
+                entry => new DataPanelItem(entry.Value.ToString()));
+        }
+    }
+
+    private Dictionary<string, DataPanelItem> WorkflowOutputData
+    {
+        get
+        {
+            if (_workflowInstance == null)
+                return new Dictionary<string, DataPanelItem>();
+            
+            return _workflowInstance.WorkflowState.Output.ToDictionary(entry => entry.Key,
+                entry => new DataPanelItem(entry.Value.ToString()));
+        }
+    }
+
     private Dictionary<string, DataPanelItem> WorkflowInstanceSubWorkflowData
     {
         get
         {
             if (SelectedSubWorkflow == null)
-                return new ();
+                return new();
 
             var typeName = SelectedSubWorkflow.GetTypeName();
             var version = SelectedSubWorkflow.GetVersion();
             var descriptor = ActivityRegistry.Find(typeName, version);
-            var isWorkflowActivity = descriptor != null && descriptor.CustomProperties.TryGetValue("RootType", out var rootTypeNameElement) && ((JsonElement)rootTypeNameElement).GetString() == "WorkflowDefinitionActivity";
+            var isWorkflowActivity = descriptor != null &&
+                                     descriptor.CustomProperties.TryGetValue("RootType", out var rootTypeNameElement) &&
+                                     ((JsonElement)rootTypeNameElement).GetString() == "WorkflowDefinitionActivity";
             var workflowDefinitionId = isWorkflowActivity ? SelectedSubWorkflow.GetWorkflowDefinitionId() : default;
 
             if (workflowDefinitionId == null)
-                return new ();
+                return new();
 
             return new()
             {
@@ -101,9 +147,72 @@ public partial class WorkflowInstanceDetails
         }
     }
 
-    public void UpdateSubWorkflow(JsonObject? obj)
+    private Dictionary<string, DataPanelItem> SubWorkflowInputData
+    {
+        get
+        {
+            if (SelectedSubWorkflowExecutions == null || SelectedSubWorkflow == null)
+                return new Dictionary<string, DataPanelItem>();
+
+            var execution = SelectedSubWorkflowExecutions.LastOrDefault();
+            var inputData = new Dictionary<string, DataPanelItem>();
+            var activityState = execution?.ActivityState;
+            if (activityState != null)
+            {
+                var activityDescriptor =
+                    ActivityRegistry.Find(SelectedSubWorkflow.GetTypeName(), SelectedSubWorkflow.GetVersion())!;
+                foreach (var inputDescriptor in activityDescriptor.Inputs)
+                {
+                    var inputValue = activityState.TryGetValue(inputDescriptor.Name, out var value) ? value : default;
+                    inputData[inputDescriptor.Name] = new(inputValue?.ToString());
+                }
+            }
+
+            return inputData;
+        }
+    }
+
+    private Dictionary<string, DataPanelItem> SubWorkflowOutputData
+    {
+        get
+        {
+            if (SelectedSubWorkflowExecutions == null || SelectedSubWorkflow == null)
+                return new Dictionary<string, DataPanelItem>();
+
+            var execution = SelectedSubWorkflowExecutions.LastOrDefault();
+            var outputData = new Dictionary<string, DataPanelItem>();
+
+            if (execution != null)
+            {
+                var outputs = execution.Outputs;
+                var activityDescriptor =
+                    ActivityRegistry.Find(SelectedSubWorkflow.GetTypeName(), SelectedSubWorkflow.GetVersion())!;
+                var outputDescriptors = activityDescriptor.Outputs;
+
+                foreach (var outputDescriptor in outputDescriptors)
+                {
+                    var outputValue = outputs != null
+                        ? outputs.TryGetValue(outputDescriptor.Name, out var value) ? value : default
+                        : default;
+                    outputData[outputDescriptor.Name] = new(outputValue?.ToString());
+                }
+            }
+
+            return outputData;
+        }
+    }
+
+    /// <summary>
+    /// Updates the selected sub-workflow.
+    /// </summary>
+    /// <param name="obj"></param>
+    public async Task UpdateSubWorkflowAsync(JsonObject? obj)
     {
         SelectedSubWorkflow = obj;
+        SelectedSubWorkflowExecutions = obj == null
+            ? null
+            : (await InvokeWithBlazorServiceContext(() =>
+                ActivityExecutionService.ListAsync(WorkflowInstance!.Id, obj.GetNodeId()!))).ToList();
         StateHasChanged();
     }
 
diff --git a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceWorkspace.razor b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceWorkspace.razor
index 9afce602..bbc33509 100644
--- a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceWorkspace.razor
+++ b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceWorkspace.razor
@@ -19,6 +19,7 @@
                     var definition = WorkflowDefinitions.First(x => x.Id == workflowInstance.DefinitionVersionId);
                     <MudTabPanel Text="@workflowInstance.Id" ShowCloseIcon="false" Style="height: 100%">
                         <WorkflowInstanceDesigner
+                             @ref="@_workflowInstanceDesigner"
                             WorkflowInstance="workflowInstance" 
                             WorkflowDefinition="definition" 
                             PathChanged="OnPathChanged" 
@@ -33,7 +34,7 @@
 
         </RadzenSplitterPane>
         <RadzenSplitterPane Size="35%" Min="100px">
-            <WorkflowInstanceDetails @ref="@_workflowInstanceDetails" WorkflowInstance="@SelectedWorkflowInstance" WorkflowDefinition="SelectedWorkflowDefinition" />
+            <WorkflowInstanceDetails @ref="@_workflowInstanceDetails" WorkflowInstance="@SelectedWorkflowInstance" WorkflowDefinition="SelectedWorkflowDefinition"/>
         </RadzenSplitterPane>
 
     </RadzenSplitter>
diff --git a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceWorkspace.razor.cs b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceWorkspace.razor.cs
index 34bfd34c..f3522ae2 100644
--- a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceWorkspace.razor.cs
+++ b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/Components/WorkflowInstanceWorkspace.razor.cs
@@ -1,5 +1,6 @@
 using System.Text.Json.Nodes;
 using Elsa.Api.Client.Extensions;
+using Elsa.Api.Client.Resources.ActivityExecutions.Models;
 using Elsa.Api.Client.Resources.WorkflowDefinitions.Models;
 using Elsa.Api.Client.Resources.WorkflowInstances.Models;
 using Elsa.Studio.Workflows.Components.WorkflowDefinitionEditor.Components;
@@ -15,6 +16,7 @@ public partial class WorkflowInstanceWorkspace : IWorkspace
 {
     private MudDynamicTabs _dynamicTabs = default!;
     private WorkflowInstanceDetails _workflowInstanceDetails = default!;
+    private WorkflowInstanceDesigner _workflowInstanceDesigner = default!;
 
     [Parameter] public IList<WorkflowInstance> WorkflowInstances { get; set; } = default!;
     [Parameter] public IList<WorkflowDefinition> WorkflowDefinitions { get; set; } = default!;
@@ -36,7 +38,7 @@ public partial class WorkflowInstanceWorkspace : IWorkspace
         ActiveTabIndex >= 0 && ActiveTabIndex < WorkflowInstances.Count
             ? WorkflowInstances.ElementAtOrDefault(ActiveTabIndex)
             : default;
-
+    
     private WorkflowDefinition? SelectedWorkflowDefinition
     {
         get
@@ -66,7 +68,8 @@ private async Task OnActivePanelIndexChanged(int value)
 
     private async Task OnPathChanged(DesignerPathChangedArgs args)
     {
-        _workflowInstanceDetails.UpdateSubWorkflow(args.CurrentActivity);
+        await _workflowInstanceDetails.UpdateSubWorkflowAsync(args.CurrentActivity);
+        _workflowInstanceDesigner.UpdateSubWorkflow(args.CurrentActivity);
         
         if (PathChanged != null)
             await PathChanged(args);
diff --git a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/WorkflowInstanceViewer.razor.cs b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/WorkflowInstanceViewer.razor.cs
index 7aa0a5e2..af38ecf1 100644
--- a/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/WorkflowInstanceViewer.razor.cs
+++ b/src/modules/Elsa.Studio.Workflows/Components/WorkflowInstanceViewer/WorkflowInstanceViewer.razor.cs
@@ -42,7 +42,7 @@ protected override async Task OnInitializedAsync()
     {
         var instance = await WorkflowInstanceService.GetAsync(InstanceId) ?? throw new InvalidOperationException($"Workflow instance with ID {InstanceId} not found.");
         var definitionVersionIds = new[] { instance.DefinitionVersionId };
-        var response = await WorkflowDefinitionService.FindManyByIdAsync(definitionVersionIds);
+        var response = await WorkflowDefinitionService.FindManyByIdAsync(definitionVersionIds, true);
         _workflowInstances = new List<WorkflowInstance> { instance };
         _workflowDefinitions = response.ToList();
         await SelectWorkflowInstanceAsync(instance);
diff --git a/src/modules/Elsa.Studio.Workflows/Shared/Components/DiagramDesignerWrapper.razor.cs b/src/modules/Elsa.Studio.Workflows/Shared/Components/DiagramDesignerWrapper.razor.cs
index a94ce16f..f618d2bb 100644
--- a/src/modules/Elsa.Studio.Workflows/Shared/Components/DiagramDesignerWrapper.razor.cs
+++ b/src/modules/Elsa.Studio.Workflows/Shared/Components/DiagramDesignerWrapper.razor.cs
@@ -1,6 +1,11 @@
 using System.Text.Json.Nodes;
+using System.Threading.Tasks;
 using Elsa.Api.Client.Extensions;
 using Elsa.Api.Client.Shared.Models;
+using Elsa.Studio.Contracts;
+using Elsa.Studio.Workflows.Components.WorkflowInstanceViewer;
+using Elsa.Studio.Workflows.Designer;
+using Elsa.Studio.Workflows.Designer.Models;
 using Elsa.Studio.Workflows.Domain.Contexts;
 using Elsa.Studio.Workflows.Domain.Contracts;
 using Elsa.Studio.Workflows.Extensions;