diff --git a/examples/simple_output.ipynb b/examples/simple_output.ipynb
index 8164844..5a759c9 100644
--- a/examples/simple_output.ipynb
+++ b/examples/simple_output.ipynb
@@ -90,23 +90,37 @@
     "so"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "8",
+   "metadata": {},
+   "source": [
+    "Or we could do it with one message..."
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "8",
+   "id": "9",
    "metadata": {},
    "outputs": [],
    "source": [
-    "# or we could do it with one message\n",
-    "so.clear()\n",
-    "so.push(*(f\"test {i}\\n\" for i in range(100)))\n",
-    "# Not that we've just sent 100 'outputs' in one message.\n",
-    "# All of the 100 lines are squashed into the 200px high simple output."
+    "so.clear(wait=False)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "10",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "so.push(*(f\"test {i}\\n\" for i in range(50)))"
    ]
   },
   {
    "cell_type": "markdown",
-   "id": "9",
+   "id": "11",
    "metadata": {},
    "source": [
     "### set\n",
@@ -117,7 +131,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "10",
+   "id": "12",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -127,7 +141,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "11",
+   "id": "13",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -137,7 +151,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "12",
+   "id": "14",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -147,7 +161,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "13",
+   "id": "15",
    "metadata": {},
    "source": [
     "## max_continuous_streams\n",
@@ -162,7 +176,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "14",
+   "id": "16",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -173,7 +187,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "15",
+   "id": "17",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -183,7 +197,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "16",
+   "id": "18",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -193,7 +207,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "17",
+   "id": "19",
    "metadata": {},
    "source": [
     "# AutoScroll\n",
@@ -207,7 +221,7 @@
   },
   {
    "cell_type": "markdown",
-   "id": "18",
+   "id": "20",
    "metadata": {},
    "source": [
     "## Builtin log viewer\n",
@@ -218,7 +232,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "19",
+   "id": "21",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -231,7 +245,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "20",
+   "id": "22",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -240,9 +254,19 @@
     "    app.log.error(\"Demo\")"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "23",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "app.log_viewer.connections[0].close()"
+   ]
+  },
   {
    "cell_type": "markdown",
-   "id": "21",
+   "id": "24",
    "metadata": {},
    "source": [
     "## Example usage"
@@ -251,7 +275,7 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "22",
+   "id": "25",
    "metadata": {},
    "outputs": [],
    "source": [
@@ -266,40 +290,61 @@
   {
    "cell_type": "code",
    "execution_count": null,
-   "id": "23",
+   "id": "26",
    "metadata": {},
    "outputs": [],
    "source": [
     "vb = ipw.VBox()\n",
     "sw = AutoScroll(content=vb)\n",
+    "sw.sentinel_text = \"sentinel\"\n",
     "sw_holder = ipw.VBox([sw], layout={\"height\": \"200px\", \"border\": \"solid\"})\n",
     "\n",
-    "enabled = ipw.Checkbox(description=\"Auto scroll\", indent=False)\n",
+    "enabled = ipw.Checkbox(description=\"Auto scroll\", layout={\"width\": \"120px\"}, indent=False)\n",
     "ipw.link((sw, \"enabled\"), (enabled, \"value\"))\n",
     "sleep = ipw.FloatSlider(description=\"Sleep time (s)\", value=0.3, min=0.05, max=1, step=0.01)\n",
     "\n",
-    "b = ipw.Button(description=\"Start\")\n",
+    "b_start = ipw.Button(description=\"Start\", layout={\"width\": \"max-content\"})\n",
+    "b_clear = ipw.Button(description=\"Clear\", layout={\"width\": \"max-content\"})\n",
+    "direction = ipw.RadioButtons(options=[\"fwd\", \"rev\"], orientation=\"horizontal\", layout={\"width\": \"auto\"})\n",
     "\n",
     "\n",
     "def on_click(b):\n",
-    "    if b.description == \"Start\":\n",
-    "        import asyncio\n",
+    "    if b is b_start:\n",
+    "        if b.description == \"Start\":\n",
+    "            import asyncio\n",
+    "\n",
+    "            async def generate_output():\n",
+    "                while True:\n",
+    "                    vb.children = (*vb.children, ipw.HTML(f\"It is now {datetime.now().isoformat()}\"))  # noqa: DTZ005\n",
+    "                    await asyncio.sleep(sleep.value)\n",
+    "\n",
+    "            b.task = ipylab.app.to_task(generate_output())\n",
+    "            b.description = \"Stop\"\n",
+    "        else:\n",
+    "            b.task.cancel()\n",
+    "            b.description = \"Start\"\n",
+    "    if b is b_clear:\n",
+    "        vb.children = ()\n",
+    "\n",
+    "\n",
+    "b_start.on_click(on_click)\n",
+    "b_clear.on_click(on_click)\n",
     "\n",
-    "        async def generate_output():\n",
-    "            while True:\n",
-    "                vb.children = (*vb.children, ipw.HTML(f\"It is now {datetime.now().isoformat()}\"))  # noqa: DTZ005\n",
-    "                await asyncio.sleep(sleep.value)\n",
     "\n",
-    "        b.task = ipylab.app.to_task(generate_output())\n",
-    "        b.description = \"Stop\"\n",
+    "def _observe_direction(_):\n",
+    "    if direction.value == \"fwd\":\n",
+    "        sw.mode = \"end\"\n",
+    "        vb.layout.flex_flow = \"column\"\n",
     "    else:\n",
-    "        b.task.cancel()\n",
-    "        b.description = \"Start\"\n",
+    "        sw.mode = \"start\"\n",
+    "        vb.layout.flex_flow = \"column-reverse\"\n",
     "\n",
     "\n",
-    "b.on_click(on_click)\n",
+    "direction.observe(_observe_direction, \"value\")\n",
     "\n",
-    "p = ipylab.Panel([ipw.HBox([enabled, sleep, b], layout={\"justify_content\": \"center\"}), sw_holder])\n",
+    "p = ipylab.Panel(\n",
+    "    [ipw.HBox([enabled, sleep, direction, b_start, b_clear], layout={\"justify_content\": \"center\"}), sw_holder]\n",
+    ")\n",
     "p.add_to_shell(mode=ipylab.InsertMode.split_right)"
    ]
   }