diff --git a/src/gui_2.py b/src/gui_2.py
index 5a257a7..27f6355 100644
--- a/src/gui_2.py
+++ b/src/gui_2.py
@@ -2819,56 +2819,13 @@ class App:
    #region: Batch Action Bar
    imgui.text("Batch:")
    imgui.same_line()
-   if imgui.button("Full##batch"):
-    for f in self.context_files:
-     f_path = f.path if hasattr(f, "path") else str(f)
-     if f_path in self.ui_selected_context_files:
-      f.force_full = True
-      f.auto_aggregate = False
-      if hasattr(f, "ast_signatures"):
-       f.ast_signatures = False
-       f.ast_definitions = False
-   imgui.same_line()
-   if imgui.button("Agg##batch"):
-    for f in self.context_files:
-     f_path = f.path if hasattr(f, "path") else str(f)
-     if f_path in self.ui_selected_context_files:
-      f.auto_aggregate = True
-      f.force_full = False
-      if hasattr(f, "ast_signatures"):
-       f.ast_signatures = False
-       f.ast_definitions = False
-   imgui.same_line()
-   if imgui.button("Sig##batch"):
-    for f in self.context_files:
-     f_path = f.path if hasattr(f, "path") else str(f)
-     if f_path in self.ui_selected_context_files:
-      if hasattr(f, "ast_signatures"):
-       f.ast_signatures = True
-       f.force_full = False
-       f.auto_aggregate = False
-       f.ast_definitions = False
-   imgui.same_line()
-   if imgui.button("Def##batch"):
-    for f in self.context_files:
-     f_path = f.path if hasattr(f, "path") else str(f)
-     if f_path in self.ui_selected_context_files:
-      if hasattr(f, "ast_definitions"):
-       f.ast_definitions = True
-       f.force_full = False
-       f.auto_aggregate = False
-       f.ast_signatures = False
-   imgui.same_line()
-   if imgui.button("None##batch"):
-    for f in self.context_files:
-     f_path = f.path if hasattr(f, "path") else str(f)
-     if f_path in self.ui_selected_context_files:
-      f.auto_aggregate = False
-      f.force_full = False
-      if hasattr(f, "ast_signatures"):
-       f.ast_signatures = False
-       f.ast_definitions = False
-   imgui.same_line()
+   for mode in ["full", "summary", "skeleton", "outline", "masked", "none"]:
+    if imgui.button(f"{mode.capitalize()}##batch"):
+     for f in self.context_files:
+      f_path = f.path if hasattr(f, "path") else str(f)
+      if f_path in self.ui_selected_context_files:
+       f.view_mode = mode
+    imgui.same_line()
    if imgui.button("Sel All##selall"):
     for f in self.context_files:
      f_path = f.path if hasattr(f, "path") else str(f)
@@ -2970,15 +2927,21 @@ class App:
         self.show_text_viewer = True
 
        imgui.table_set_column_index(1)
-       if hasattr(f_item, "auto_aggregate"):
-        changed_agg, f_item.auto_aggregate = imgui.checkbox(f"Agg##cc{i}", f_item.auto_aggregate)
+       if not hasattr(f_item, "view_mode"):
+        f_item.view_mode = "summary"
+       view_modes = ["full", "summary", "skeleton", "outline", "masked", "none"]
+       try:
+        current_idx = view_modes.index(f_item.view_mode)
+       except ValueError:
+        current_idx = 1
+        f_item.view_mode = "summary"
+       imgui.set_next_item_width(120)
+       changed_vm, new_idx = imgui.combo(f"##vm{i}", current_idx, view_modes)
+       if changed_vm:
+        f_item.view_mode = view_modes[new_idx]
+       if hasattr(f_item, "custom_slices") and f_item.custom_slices:
         imgui.same_line()
-        changed_full, f_item.force_full = imgui.checkbox(f"Full##cc{i}", f_item.force_full)
-        if hasattr(f_item, "ast_signatures"):
-         imgui.same_line()
-         _, f_item.ast_signatures = imgui.checkbox(f"Sig##cc{i}", f_item.ast_signatures)
-         imgui.same_line()
-         _, f_item.ast_definitions = imgui.checkbox(f"Def##cc{i}", f_item.ast_definitions)
+        imgui.text_colored(imgui.ImVec4(1.0, 0.5, 0.0, 1.0), "[Slices Active]")
       imgui.tree_pop()
     imgui.end_table()
    # Context Composition collasping header
diff --git a/tests/test_context_composition_phase4.py b/tests/test_context_composition_phase4.py
new file mode 100644
index 0000000..09b7ca5
--- /dev/null
+++ b/tests/test_context_composition_phase4.py
@@ -0,0 +1,35 @@
+import pytest
+from src.gui_2 import App
+from src.models import FileItem
+
+def test_view_mode_initialization():
+    app = App()
+    # Mock imgui
+    from imgui_bundle import imgui
+    
+    app.context_files = [
+        FileItem(path="test1.py"),
+        FileItem(path="test2.py", view_mode="full")
+    ]
+    
+    # We test the model defaults and the rendering assignment logic indirectly.
+    assert app.context_files[0].view_mode == "full" # Default from FileItem Model
+    assert app.context_files[1].view_mode == "full"
+
+def test_batch_view_mode_change():
+    app = App()
+    
+    f1 = FileItem(path="test1.py", view_mode="full")
+    f2 = FileItem(path="test2.py", view_mode="full")
+    
+    app.context_files = [f1, f2]
+    app.ui_selected_context_files = {"test1.py"}
+    
+    # Simulate clicking "Skeleton" batch button
+    for f in app.context_files:
+        f_path = f.path if hasattr(f, "path") else str(f)
+        if f_path in app.ui_selected_context_files:
+            f.view_mode = "skeleton"
+            
+    assert f1.view_mode == "skeleton"
+    assert f2.view_mode == "full" # not selected