diff --git a/demo/voila_demo.ipynb b/demo/voila_demo.ipynb
index 9fe7726..040c12a 100644
--- a/demo/voila_demo.ipynb
+++ b/demo/voila_demo.ipynb
@@ -351,16 +351,24 @@
     "        atl06_rsps.leaflet.redraw()\n",
     "\n",
     "# show code action\n",
+    "global code06_is_shown\n",
+    "code06_is_shown = False\n",
     "def on_show_code06_clicked(b):\n",
-    "    global url_textbox, atl06_parms\n",
+    "    global url_textbox, atl06_parms, code06_is_shown\n",
     "    with show_code06_output:\n",
     "        display.clear_output()\n",
-    "        print(f'icesat2.init()')\n",
-    "        # validate boolean entries to be in title case\n",
-    "        atl06_json = json.dumps(atl06_parms, indent=4)\n",
-    "        atl06_json = re.sub(r'\\b(true|false)', lambda m: m.group(1).title(), atl06_json)\n",
-    "        print('parms = ', atl06_json, sep='')\n",
-    "        print('gdf = icesat2.atl06p(parms)')\n",
+    "        code06_is_shown = not code06_is_shown\n",
+    "        if code06_is_shown:\n",
+    "            print(f'icesat2.init()')\n",
+    "            # validate boolean entries to be in title case\n",
+    "            atl06_json = json.dumps(atl06_parms, indent=4)\n",
+    "            atl06_json = re.sub(r'\\b(true|false)', lambda m: m.group(1).title(), atl06_json)\n",
+    "            print('parms = ', atl06_json, sep='')\n",
+    "            print('gdf = icesat2.atl06p(parms)')\n",
+    "            show_code06_button.description = \"Unshow Code\"\n",
+    "        else:\n",
+    "            show_code06_button.description = \"Show Code\"\n",
+    "\n",
     "\n",
     "# Download ATL06-SR data as geojson\n",
     "display.display(download_output)\n",
@@ -449,7 +457,7 @@
     "# display buttons\n",
     "display.display(run_button)\n",
     "display.display(SRwidgets.HBox([download_atl06_button, SRwidgets.file_format]))\n",
-    "display.display(SRwidgets.HBox([show_code06_button, show_code06_output]))"
+    "display.display(show_code06_button, show_code06_output)"
    ]
   },
   {
@@ -639,17 +647,23 @@
     "m.add_selected_callback(click_handler)\n",
     "\n",
     "# show code action\n",
+    "global code03_is_shown\n",
+    "code03_is_shown = False\n",
     "def on_show_code03_clicked(b):\n",
-    "    global url_textbox, atl03_parms\n",
+    "    global url_textbox, atl03_parms, code03_is_shown\n",
     "    with show_code03_output:\n",
     "        display.clear_output()\n",
-    "        print(f'icesat2.init()')\n",
-    "        # validate boolean entries to be in title case\n",
-    "        atl03_json = json.dumps(atl03_parms, indent=4)\n",
-    "        atl03_json = re.sub(r'\\b(true|false)', lambda m: m.group(1).title(), atl03_json)\n",
-    "        print('parms = ', atl03_json, sep='')\n",
-    "        print('gdf = icesat2.atl03sp(parms)')\n",
-    "\n",
+    "        code03_is_shown = not code03_is_shown\n",
+    "        if code03_is_shown:\n",
+    "            print(f'icesat2.init()')\n",
+    "            # validate boolean entries to be in title case\n",
+    "            atl03_json = json.dumps(atl03_parms, indent=4)\n",
+    "            atl03_json = re.sub(r'\\b(true|false)', lambda m: m.group(1).title(), atl03_json)\n",
+    "            print('parms = ', atl03_json, sep='')\n",
+    "            print('gdf = icesat2.atl03sp(parms)')\n",
+    "            show_code03_button.description = \"Unshow Code\"\n",
+    "        else:\n",
+    "            show_code03_button.description = \"Show Code\"\n",
     "\n",
     "def on_atl03_download_clicked(e=None):\n",
     "    download_file(atl03_rsps, SRwidgets.atl03_filename,\n",