diff --git a/src/components/entryselector/assets/EntrySelector.css b/src/components/entryselector/assets/EntrySelector.css
new file mode 100644
index 0000000..e6fa317
--- /dev/null
+++ b/src/components/entryselector/assets/EntrySelector.css
@@ -0,0 +1,16 @@
+.es-container {
+  overflow-x: auto;
+  white-space: nowrap;
+
+}
+
+.es-entry {
+  border: 2px solid var(--color-base-300);
+  padding: 2px;
+  cursor: pointer;
+  display: inline-block; /* Ensure entries align horizontally if needed */
+}
+
+.es-entry:hover {
+  background-color: var(--color-base-300);
+}
\ No newline at end of file
diff --git a/src/components/entryselector/components/EntrySelector.py b/src/components/entryselector/components/EntrySelector.py
index 7896d2d..738bc61 100644
--- a/src/components/entryselector/components/EntrySelector.py
+++ b/src/components/entryselector/components/EntrySelector.py
@@ -40,7 +40,6 @@ class EntrySelector(BaseComponentMultipleInstance):
   def __ft__(self):
     return Div(
       *self._mk_content(),
-      style=f"width: {self._boundaries['width']}px;",
-      cls="flex",
+      cls="flex es-container",
       id=f"{self._id}",
     )
diff --git a/src/components/workflows/components/WorkflowDesignerProperties.py b/src/components/workflows/components/WorkflowDesignerProperties.py
index 787a170..aa943d8 100644
--- a/src/components/workflows/components/WorkflowDesignerProperties.py
+++ b/src/components/workflows/components/WorkflowDesignerProperties.py
@@ -29,7 +29,8 @@ class WorkflowDesignerProperties(BaseComponent):
     self._input_entry_selector = InstanceManager.new(self._session,
                                                      EntrySelector,
                                                      owner=self,
-                                                     content_id=f"pic_{self._id}", data=100)
+                                                     content_id=f"pic_{self._id}",
+                                                     data=100)
     self._output_entry_selector = InstanceManager.new(self._session,
                                                       EntrySelector,
                                                       owner=self,
diff --git a/src/components/workflows/components/WorkflowPlayer.py b/src/components/workflows/components/WorkflowPlayer.py
index 5e16952..75d2a1c 100644
--- a/src/components/workflows/components/WorkflowPlayer.py
+++ b/src/components/workflows/components/WorkflowPlayer.py
@@ -98,6 +98,8 @@ class WorkflowPlayer(BaseComponent):
         
         if component.id not in engine.errors:
           runtime_state.state = ComponentState.SUCCESS
+          runtime_state.input = engine.debug[component.id]["input"]
+          runtime_state.output = engine.debug[component.id]["output"]
           continue
         
         # the component failed
@@ -177,7 +179,7 @@ class WorkflowPlayer(BaseComponent):
     # Return sorted components
     return [components_by_id[cid] for cid in sorted_order]
   
-  def _get_engine(self, sorted_components):
+  def _get_engine(self, sorted_components) -> WorkflowEngine:
     # first reorder the component, according to the connection definitions
     engine = WorkflowEngine()
     for component in sorted_components:
diff --git a/src/components/workflows/db_management.py b/src/components/workflows/db_management.py
index e2b00f9..dbc9d15 100644
--- a/src/components/workflows/db_management.py
+++ b/src/components/workflows/db_management.py
@@ -48,6 +48,8 @@ class WorkflowComponentRuntimeState:
   id: str
   state: ComponentState = ComponentState.SUCCESS
   error_message: str | None = None
+  input: list = None
+  output: list = None
 
 
 @dataclass
@@ -62,7 +64,7 @@ class WorkflowsDesignerState:
   component_counter: int = 0
   designer_height: int = 230
   properties_input_width: int = None
-  properties_properties_width : int = None
+  properties_properties_width: int = None
   properties_output_width: int = None
   selected_component_id: str | None = None
 
diff --git a/src/workflow/engine.py b/src/workflow/engine.py
index e57a931..ebc687f 100644
--- a/src/workflow/engine.py
+++ b/src/workflow/engine.py
@@ -1,6 +1,7 @@
 import ast
 import logging
 from abc import ABC, abstractmethod
+from dataclasses import dataclass
 from typing import Any, Generator
 
 from components.admin.admin_db_manager import AdminDbManager
@@ -11,6 +12,14 @@ from core.utils import UnreferencedNamesVisitor
 from utils.Datahelper import DataHelper
 
 
+@dataclass
+class WorkflowPayload:
+  processor_name: str
+  component_id: str
+  item_linkage_id: int
+  item: Any
+
+
 class DataProcessorError(Exception):
   def __init__(self, component_id, error):
     self.component_id = component_id
@@ -146,35 +155,56 @@ class WorkflowEngine:
     self.has_error = False
     self.global_error = None
     self.errors = {}
+    self.debug = {}
+    self.item_count = -1
   
   def add_processor(self, processor: DataProcessor) -> 'WorkflowEngine':
     """Add a data processor to the pipeline."""
     self.processors.append(processor)
     return self
   
-  def _process_single_item(self, item: Any, processor_index: int = 0) -> Generator[Any, None, None]:
+  def _process_single_item(self, item_linkage_id, item: Any, processor_index: int = 0) -> Generator[Any, None, None]:
     """Process a single item through the remaining processors."""
     if processor_index >= len(self.processors):
       yield item
       return
     
     processor = self.processors[processor_index]
+    if not processor.component_id in self.debug:
+      self.debug[processor.component_id] = {"input": [], "output": []}
+    
+    self.debug[processor.component_id]["input"].append(WorkflowPayload(
+      processor_name=processor.__class__.__name__,
+      component_id=processor.component_id,
+      item_linkage_id=item_linkage_id,
+      item=item))
     
     # Process the item through the current processor
     for processed_item in processor.process(item):
+      self.debug[processor.component_id]["output"].append(WorkflowPayload(
+        processor_name=processor.__class__.__name__,
+        component_id=processor.component_id,
+        item_linkage_id=item_linkage_id,
+        item=processed_item))
+      
       # Recursively process through remaining processors
-      yield from self._process_single_item(processed_item, processor_index + 1)
+      yield from self._process_single_item(item_linkage_id, processed_item, processor_index + 1)
   
   def run(self) -> Generator[Any, None, None]:
     """
     Run the workflow pipeline and yield results one by one.
     The first processor must be a DataProducer.
     """
+    
+    self.debug.clear()
+    
     if not self.processors:
       self.has_error = False
       self.global_error = "No processors in the pipeline"
+      self.item_count = -1
       raise ValueError(self.global_error)
     
+    self.item_count = 0
     first_processor = self.processors[0]
     
     if not isinstance(first_processor, DataProducer):
@@ -182,8 +212,16 @@ class WorkflowEngine:
       self.global_error = "First processor must be a DataProducer"
       raise ValueError(self.global_error)
     
-    for item in first_processor.process(None):
-      yield from self._process_single_item(item, 1)
+    self.debug[first_processor.component_id] = {"input": [], "output": []}
+    
+    for item_linkage_id, item in enumerate(first_processor.process(None)):
+      self.item_count += 1
+      self.debug[first_processor.component_id]["output"].append(WorkflowPayload(
+        processor_name=first_processor.__class__.__name__,
+        component_id=first_processor.component_id,
+        item_linkage_id=item_linkage_id,
+        item=item))
+      yield from self._process_single_item(item_linkage_id, item, 1)
   
   def run_to_list(self) -> list[Any]:
     """