diff --git a/DemoPrograms/Demo_Graph_Element_Sine_Wave.py b/DemoPrograms/Demo_Graph_Element_Sine_Wave.py
index 0f8daed6..a1889d08 100644
--- a/DemoPrograms/Demo_Graph_Element_Sine_Wave.py
+++ b/DemoPrograms/Demo_Graph_Element_Sine_Wave.py
@@ -1,11 +1,30 @@
 import PySimpleGUI as sg
 import math
 
-# Yet another usage of Graph element.
+"""
+    Demo - Graph Element used to plot a mathematical formula
+    
+    The Graph element has a flexible coordinate system that you define.
+    Thie makes is possible for you to work in your coordinates instead of an
+    arbitrary system.
+    
+    For example, in a typical mathematics graph, (0,0) is located at the center
+    of the graph / page / diagram.
+    This Demo Program shows a graph with (0,0) being at the center of the Graph
+    area rather than at one of the corners.
+    
+    It graphs the formula:
+        y = sine(x/x2) * x1
+        
+    The values of x1 and x2 can be changed using 2 sliders
+
+    Copyright 2018, 2019, 2020, 2021, 2022 PySimpleGUI
+    
+"""
 
 SIZE_X = 200
-SIZE_Y = 100
-NUMBER_MARKER_FREQUENCY = 25
+SIZE_Y = 200
+NUMBER_MARKER_FREQUENCY = SIZE_X//8     # How often to put tick marks on the axis
 
 
 def draw_axis():
@@ -13,44 +32,45 @@ def draw_axis():
     graph.draw_line((0, -SIZE_Y), (0, SIZE_Y))
 
     for x in range(-SIZE_X, SIZE_X+1, NUMBER_MARKER_FREQUENCY):
-        graph.draw_line((x, -3), (x, 3))                       # tick marks
+        graph.draw_line((x, -SIZE_Y/66), (x, SIZE_Y/66))                       # tick marks
         if x != 0:
             # numeric labels
-            graph.draw_text(str(x), (x, -10), color='green')
+            graph.draw_text(str(x), (x, -SIZE_Y/15), color='green', font='courier 10')
 
     for y in range(-SIZE_Y, SIZE_Y+1, NUMBER_MARKER_FREQUENCY):
-        graph.draw_line((-3, y), (3, y))
+        graph.draw_line((-SIZE_X/66, y), (SIZE_X/66, y))
         if y != 0:
-            graph.draw_text(str(y), (-10, y), color='blue')
+            graph.draw_text(str(y), (-SIZE_X/11, y), color='blue', font='courier 10')
 
-sg.theme('DarkAmber')
-
-# Create the graph that will be put into the window
-graph = sg.Graph(canvas_size=(400, 400),
+# Create the graph that will be put into the window. Making outside of layout so have element in a variable
+graph = sg.Graph(canvas_size=(500, 500),
                  graph_bottom_left=(-(SIZE_X+5), -(SIZE_Y+5)),
                  graph_top_right=(SIZE_X+5, SIZE_Y+5),
-                 background_color='white',
-                 key='graph')
+                 background_color='white', expand_x=True, expand_y=True,
+                 key='-GRAPH-')
 # Window layout
-layout = [[sg.Text('Example of Using Math with a Graph', justification='center', size=(50, 1), relief=sg.RELIEF_SUNKEN)],
+layout = [[sg.Text('Graph Element Combined with Math!', justification='center', relief=sg.RELIEF_SUNKEN, expand_x=True, font='Courier 18')],
           [graph],
-          [sg.Text('y = sin(x / x2 * x1)', font='COURIER 18')],
-          [sg.Text('x1'), sg.Slider((0, 200), orientation='h',
-                                 enable_events=True, key='-SLIDER-')],
-          [sg.Text('x2'), sg.Slider((1, 200), orientation='h', enable_events=True, key='-SLIDER2-')]]
+          [sg.Text('y = sin(x / x2) * x1', font='COURIER 18')],
+          [sg.Text('x1', font='Courier 14'), sg.Slider((0, SIZE_Y), orientation='h', enable_events=True, key='-SLIDER-', expand_x=True)],
+          [sg.Text('x2', font='Courier 14'), sg.Slider((1, SIZE_Y), orientation='h', enable_events=True, key='-SLIDER2-', expand_x=True)]]
 
-window = sg.Window('Graph of Sine Function', layout)
+window = sg.Window('Graph of Sine Function', layout, finalize=True)
+
+draw_axis()     # draw the axis (an empty graph)
 
 while True:
     event, values = window.read()
     if event == sg.WIN_CLOSED:
         break
-    graph.erase()
-    draw_axis()
-    prev_x = prev_y = None
+        
+    graph.erase()           # erase entire graph every time there's a change to a slider
+    draw_axis()             # redraw the axis
 
+    # plot the function by drawing short line segments
+    prev_x = prev_y = None
     for x in range(-SIZE_X, SIZE_X):
-        y = math.sin(x/int(values['-SLIDER2-']))*int(values['-SLIDER-'])
+        y = math.sin(x/int(values['-SLIDER2-'])) * int(values['-SLIDER-'])
         if prev_x is not None:
             graph.draw_line((prev_x, prev_y), (x, y), color='red')
         prev_x, prev_y = x, y