diff --git a/DemoPrograms/Demo_Tabs_Nested.py b/DemoPrograms/Demo_Tabs_Nested.py
index f8e00eb9..c48f29c6 100644
--- a/DemoPrograms/Demo_Tabs_Nested.py
+++ b/DemoPrograms/Demo_Tabs_Nested.py
@@ -1,7 +1,21 @@
-#!/usr/bin/env python
 import PySimpleGUI as sg
 
-# Yet another example of TabGroup element
+"""
+    Demo - Yet another example of TabGroup element
+
+    These are simple tabs and tab groups.  This example simply shows groups within groups.
+    Be careful with tabs to make sure you don't re-use a layout.  If you used a layout in one tab
+        you cannot use it again in another tab.  
+        
+        There was an error in this demo for quite some time that makes for a great example of this error.  
+        
+        See how tab_layout is in both Tab elements?  That's a no-go and you'll get an error poup
+
+        tab_group = sg.TabGroup([[sg.Tab('Tab 7', tab_layout), sg.Tab('Tab 8', tab_layout)]])
+
+    Copyright 2022 PySimpleGUI
+"""
+
 
 sg.theme('GreenTan')
 tab2_layout = [[sg.Text('This is inside tab 2')],
@@ -12,11 +26,12 @@ tab1_layout = [[sg.Text('Type something here and click button'), sg.Input(key='i
 tab3_layout = [[sg.Text('This is inside tab 3')]]
 tab4_layout = [[sg.Text('This is inside tab 4')]]
 
-tab_layout = [[sg.Text('This is inside of a tab')]]
-tab_group = sg.TabGroup([[sg.Tab('Tab 7', tab_layout), sg.Tab('Tab 8', tab_layout)]])
+tab_layout7 = [[sg.Text('This is inside of a tab')]]
+tab_layout8 = [[sg.Text('This is inside of a tab')]]
+tab_group = sg.TabGroup([[sg.Tab('Tab 7', tab_layout7), sg.Tab('Tab 8', tab_layout8)]])
 
 tab5_layout = [[sg.Text('Watch this window')],
-                [sg.Output(size=(40,5))]]
+                [sg.Output(size=(40,5))]]       # generally better to use a Multline, but for super-simple examples, Output is OK
 tab6_layout = [[sg.Text('This is inside tab 6')],
                [sg.Text('How about a second row of stuff in tab 6?'), tab_group]]