diff --git a/notebooks/presentations/ABZ 2021.ipynb b/notebooks/presentations/ABZ 2021.ipynb
index d7eaec16c5944fe17d1eb4beeb1c0b517f7d5a3a..86d5ffdce9f878483cb5cbbdb11acd9d2c0609f3 100644
--- a/notebooks/presentations/ABZ 2021.ipynb	
+++ b/notebooks/presentations/ABZ 2021.ipynb	
@@ -13,7 +13,7 @@
     "### David Geleßus, Michael Leuschel\n",
     "### ABZ 2021\n",
     "\n",
-    "### https://gitlab.cs.uni-duesseldorf.de/general/stups/prob2-jupyter-kernel\n",
+    "https://gitlab.cs.uni-duesseldorf.de/general/stups/prob2-jupyter-kernel\n",
     "\n",
     "![ProB](./img/prob_logo.png)"
    ]
@@ -164,7 +164,11 @@
   {
    "cell_type": "code",
    "execution_count": 3,
-   "metadata": {},
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
    "outputs": [
     {
      "data": {
@@ -216,7 +220,11 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
    "source": [
     "Outputs are rendered as $\\LaTeX$ formulas:"
    ]
@@ -246,11 +254,7 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {
-    "slideshow": {
-     "slide_type": "subslide"
-    }
-   },
+   "metadata": {},
    "source": [
     "Unicode symbols can also be used in inputs:"
    ]
@@ -365,7 +369,11 @@
   {
    "cell_type": "code",
    "execution_count": 9,
-   "metadata": {},
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
    "outputs": [
     {
      "data": {
@@ -519,7 +527,11 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
    "source": [
     "## Working with Machines"
    ]
@@ -573,7 +585,11 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
    "source": [
     "Expressions are evaluated in the current state of the machine."
    ]
@@ -647,12 +663,16 @@
   {
    "cell_type": "code",
    "execution_count": 16,
-   "metadata": {},
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "0.033 sec, 7 of 7 states processed, 11 transitions"
+       "0.040 sec, 7 of 7 states processed, 11 transitions"
       ]
      },
      "metadata": {},
@@ -713,7 +733,10 @@
    "cell_type": "code",
    "execution_count": 18,
    "metadata": {
-    "scrolled": true
+    "scrolled": true,
+    "slideshow": {
+     "slide_type": "subslide"
+    }
    },
    "outputs": [
     {
@@ -982,7 +1005,11 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
    "source": [
     "### STRING_LENGTH\n",
     "\n",
@@ -1039,7 +1066,11 @@
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
    "source": [
     "### STRING_SPLIT\n",
     "\n",
@@ -1131,7 +1162,7 @@
     "* Course materials/lecture notes as notebooks\n",
     "    * Students can execute examples themselves and experiment with the code\n",
     "    * Visualisation of concepts like relations, finite automata\n",
-    "    * `nbconvert` renders notebooks to standard formats (HTML, PDF)\n",
+    "    * `nbconvert` renders notebooks to HTML, PDF, etc.\n",
     "* Exercise sheets as notebooks\n",
     "    * An incomplete notebook with exercises is provided\n",
     "    * Students solve the exercises and turn in the finished notebook\n",
@@ -1515,6 +1546,21 @@
     "* Jupyter Notebook makes it easy to integrate new languages/tools in notebooks\n",
     "* The Jupyter ecosystem provides a standard file format and useful tools (`nbconvert`, `nbgrader`, ...)"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "subslide"
+    }
+   },
+   "source": [
+    "### Links\n",
+    "\n",
+    "Load this notebook in your browser: https://mybinder.org/v2/git/https%3A%2F%2Fgitlab.cs.uni-duesseldorf.de%2Fgeneral%2Fstups%2Fprob2-jupyter-kernel.git/master?filepath=notebooks%2Fpresentations%2FABZ%202021.ipynb\n",
+    "\n",
+    "Download and install locally: https://gitlab.cs.uni-duesseldorf.de/general/stups/prob2-jupyter-kernel"
+   ]
   }
  ],
  "metadata": {