diff --git a/DemoPrograms/Demo_Layout_Extend.py b/DemoPrograms/Demo_Layout_Extend.py
index bacbfa62..424150fd 100644
--- a/DemoPrograms/Demo_Layout_Extend.py
+++ b/DemoPrograms/Demo_Layout_Extend.py
@@ -7,27 +7,39 @@ import PySimpleGUI as sg
     Note that while you can extend, add to, a layout, you cannot delete items from a layout.  Of course you
     can make them invisible after adding them.
     
-    Copyright 2020 PySimpleGUI
+    When using scrollable Columns be sure and call Column.visibility_changed so that the scrollbars will
+        be correctly reposititioned
+        
+    Copyright 2020, 2022 PySimpleGUI
 """
 
 layout = [  [sg.Text('My Window')],
-            [sg.Text('Click to add a row inside the frame'), sg.B('+', key='-B1-')],
-            [sg.Text('Click to add a row inside the Window'), sg.B('+', key='-B2-')],
-            [sg.Frame('Frame',[[sg.T('Frame')]], key='-COL1-')],
+            [sg.Text('Click to add a row inside the Frame'), sg.B('+', key='-ADD FRAME-')],
+            [sg.Text('Click to add a row inside the Column'), sg.B('+', key='-ADD COL-')],
+            [sg.Text('Click to add a row inside the Window'), sg.B('+', key='-ADD WIN-')],
+            [sg.Frame('Frame',[[sg.T('Frame')]], key='-FRAME-')],
+            [sg.Col([[sg.T('Column')]], scrollable=True, key='-COL-', s=(400,400))],
             [sg.Input(key='-IN-'), sg.Text(size=(12,1), key='-OUT-')],
             [sg.Button('Button'), sg.Button('Exit')]  ]
 
 window = sg.Window('Window Title', layout)
+
 i = 0
+
 while True:             # Event Loop
     event, values = window.read()
     print(event, values)
     if event in (sg.WIN_CLOSED, 'Exit'):
         break
-    if event == '-B1-':
-        window.extend_layout(window['-COL1-'], [[sg.T('A New Input Line'), sg.I(key=f'-IN-{i}-')]])
+    if event == '-ADD FRAME-':
+        window.extend_layout(window['-FRAME-'], [[sg.T('A New Input Line'), sg.I(key=f'-IN-{i}-')]])
         i += 1
-    if event == '-B2-':
+    elif event == '-ADD COL-':
+        window.extend_layout(window['-COL-'], [[sg.T('A New Input Line'), sg.I(key=f'-IN-{i}-')]])
+        window.visibility_changed()
+        window['-COL-'].contents_changed()
+        i += 1
+    elif event == '-ADD WIN-':
         window.extend_layout(window, [[sg.T('A New Input Line'), sg.I(key=f'-IN-{i}-')]])
         i += 1
 window.close()
\ No newline at end of file