diff --git a/HISTORY.rst b/HISTORY.rst
index 558bf9a..7b4f07f 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -4,6 +4,7 @@ History
 
 v0.2.0dev 
 ---------
+* New keyword argument for ``display_code_comparison``,  ``include_overrides_only`` which when True (the default), only includes the classes that override the function of interest.
 * Improved typing (`PR 42 <https://github.com/data-exp-lab/inheritance_explorer/pull/42>`_)
 
 v0.2.0
diff --git a/docs/examples/ex_004_code_comparison.rst b/docs/examples/ex_004_code_comparison.rst
index d55b35d..8f4beb5 100644
--- a/docs/examples/ex_004_code_comparison.rst
+++ b/docs/examples/ex_004_code_comparison.rst
@@ -23,3 +23,7 @@ The following screenshot shows the code comparison widget in a Jupyter notebook:
 .. image:: /resources/inherit_code_widget.gif
     :width: 800
 
+By default, the code comparison widget will only display child classes that override 
+the function being compared. To include all classes, set  ``include_overrides_only==False``
+when calling ``display_code_comparison``.
+
diff --git a/inheritance_explorer/_widget_support.py b/inheritance_explorer/_widget_support.py
index 43bd0d4..b6a9bf2 100644
--- a/inheritance_explorer/_widget_support.py
+++ b/inheritance_explorer/_widget_support.py
@@ -24,17 +24,32 @@ def find_closest_source(cgt: ClassGraphTree, node_id: int):
 # it does not, get base class source
 
 
-def display_code_compare(cgt: ClassGraphTree):
-    _display_code_compare(cgt)
+def display_code_compare(cgt: ClassGraphTree, include_overrides_only: bool = True):
+    _display_code_compare(cgt, include_overrides_only=include_overrides_only)
+
+
+def _get_class_names(
+    cgt: ClassGraphTree, include_overrides_only: bool = True
+) -> list[str]:
+    if include_overrides_only is False:
+        names_classes = [nm for nm in cgt._node_map_r.keys()]
+    else:
+        names_classes = []
+        for node_id in cgt._override_src.keys():
+            names_classes.append(cgt._node_map[node_id])
+
+    names_classes.sort()
+    return names_classes
 
 
 def _display_code_compare(
     cgt: ClassGraphTree,
     class_1_name: Optional[str] = None,
     class_2_name: Optional[str] = None,
+    include_overrides_only: bool = True,
 ):
-    names_classes = [i.child_name for i in cgt._node_list]
-    names_classes.sort()
+
+    names_classes = _get_class_names(cgt, include_overrides_only=include_overrides_only)
 
     class_dropdown_1 = ipywidgets.Dropdown(options=names_classes.copy())
     class_dropdown_2 = ipywidgets.Dropdown(options=names_classes.copy())
diff --git a/inheritance_explorer/inheritance_explorer.py b/inheritance_explorer/inheritance_explorer.py
index 35bdc60..125bd7a 100644
--- a/inheritance_explorer/inheritance_explorer.py
+++ b/inheritance_explorer/inheritance_explorer.py
@@ -532,16 +532,22 @@ def get_multiple_source_code(
             src_dict[src_key] = self.get_source_code(src_key)
         return src_dict
 
-    def display_code_comparison(self):
+    def display_code_comparison(self, include_overrides_only: bool = True):
         """
         show the code comparison widget
+
+        Parameters
+        ----------
+        include_overrides_only: bool
+            if True (default), only displays the classes that override the function
+            being compared.
         """
 
         # add a check that we are running from a notebook?
         if self.funcname is not None:
             from inheritance_explorer._widget_support import display_code_compare
 
-            display_code_compare(self)
+            display_code_compare(self, include_overrides_only=include_overrides_only)
 
 
 def _validate_color(clr, default_rgb_tuple: tuple[float, float, float]) -> str:
diff --git a/inheritance_explorer/tests/test_widgets.py b/inheritance_explorer/tests/test_widgets.py
index 209b535..5399bfe 100644
--- a/inheritance_explorer/tests/test_widgets.py
+++ b/inheritance_explorer/tests/test_widgets.py
@@ -1,7 +1,7 @@
 import pytest
 
 from inheritance_explorer._testing import ClassForTesting
-from inheritance_explorer._widget_support import _display_code_compare
+from inheritance_explorer._widget_support import _display_code_compare, _get_class_names
 from inheritance_explorer.inheritance_explorer import ClassGraphTree
 
 
@@ -16,4 +16,16 @@ def test_code_comparison_widget_from_cgt(cgt):
 
 def test_secret_code_comparison_widget(cgt):
     _display_code_compare(cgt, class_1_name="ClassForTesting4")
-    _display_code_compare(cgt, class_2_name="ClassForTesting3")
+    _display_code_compare(
+        cgt, class_2_name="ClassForTesting3", include_overrides_only=False
+    )
+
+
+def test_get_class_names(cgt):
+
+    cnames_all = _get_class_names(cgt, include_overrides_only=False)
+    assert len(cnames_all) == len(cgt._node_list)
+
+    cnames_override = _get_class_names(cgt, include_overrides_only=True)
+    assert len(cnames_override) < len(cgt._node_list)
+    assert len(cnames_override) == len(cgt._override_src)