diff --git a/slides/chapter-01.de.md b/slides/chapter-01.de.md
index da58b09..2cd3316 100644
--- a/slides/chapter-01.de.md
+++ b/slides/chapter-01.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Was ist LATEX?
+1 Was ist LATEX?
@slide(layout=content-and-preview)
diff --git a/slides/chapter-01.en.md b/slides/chapter-01.en.md
index 9c020da..349a191 100644
--- a/slides/chapter-01.en.md
+++ b/slides/chapter-01.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-What is LATEX?
+1 What is LATEX?
@slide(layout=content-and-preview)
diff --git a/slides/chapter-02.de.md b/slides/chapter-02.de.md
index 2d04951..7695ca9 100644
--- a/slides/chapter-02.de.md
+++ b/slides/chapter-02.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Wie funktioniert LATEX?
+1 Wie funktioniert LATEX?
@slide(layout=content-and-preview)
diff --git a/slides/chapter-02.en.md b/slides/chapter-02.en.md
index ea835d8..649ed22 100644
--- a/slides/chapter-02.en.md
+++ b/slides/chapter-02.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-How does
LATEX work?
+2 How does
LATEX work?
@slide(layout=content-and-preview)
diff --git a/slides/chapter-03.de.md b/slides/chapter-03.de.md
index 1efc25c..1b7d316 100644
--- a/slides/chapter-03.de.md
+++ b/slides/chapter-03.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Grundstruktur eines LATEX-Dokuments
+3 Grundstruktur eines LATEX-Dokuments
@slide(layout=content-and-preview)
diff --git a/slides/chapter-03.en.md b/slides/chapter-03.en.md
index 9246c0d..b75f607 100644
--- a/slides/chapter-03.en.md
+++ b/slides/chapter-03.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Basic structure of a LATEX document
+3 Basic structure of a LATEX document
@slide(layout=content-and-preview)
diff --git a/slides/chapter-04.de.md b/slides/chapter-04.de.md
index c5e12ca..d15ecca 100644
--- a/slides/chapter-04.de.md
+++ b/slides/chapter-04.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Projektstruktur
+4 Projektstruktur
@slide(layout=content-and-preview)
diff --git a/slides/chapter-04.en.md b/slides/chapter-04.en.md
index 267e277..936669a 100644
--- a/slides/chapter-04.en.md
+++ b/slides/chapter-04.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Project structure
+4 Project structure
@slide(layout=content-and-preview)
diff --git a/slides/chapter-05.de.md b/slides/chapter-05.de.md
index dc597a3..8de05c5 100644
--- a/slides/chapter-05.de.md
+++ b/slides/chapter-05.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Sonderzeichen
+5 Sonderzeichen
@slide(layout=content-and-preview)
diff --git a/slides/chapter-05.en.md b/slides/chapter-05.en.md
index 0cc2606..149334e 100644
--- a/slides/chapter-05.en.md
+++ b/slides/chapter-05.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Special characters
+5 Special characters
@slide(layout=content-and-preview)
diff --git a/slides/chapter-06.de.md b/slides/chapter-06.de.md
index 469e18a..567bde1 100644
--- a/slides/chapter-06.de.md
+++ b/slides/chapter-06.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Textauszeichnung
+6 Textauszeichnung
@slide(layout=content-and-preview)
diff --git a/slides/chapter-06.en.md b/slides/chapter-06.en.md
index 27ff6bd..0b840a9 100644
--- a/slides/chapter-06.en.md
+++ b/slides/chapter-06.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Text Markup
+6 Text Markup
@slide(layout=content-and-preview)
diff --git a/slides/chapter-07.de.md b/slides/chapter-07.de.md
index 4391322..4df72d1 100644
--- a/slides/chapter-07.de.md
+++ b/slides/chapter-07.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Absatzformatierung
+7 Absatzformatierung
@slide(layout=content-and-preview)
diff --git a/slides/chapter-07.en.md b/slides/chapter-07.en.md
index 6a22c1f..bef24e1 100644
--- a/slides/chapter-07.en.md
+++ b/slides/chapter-07.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Formatting paragraphs
+7 Formatting paragraphs
@slide(layout=content-and-preview)
diff --git a/slides/chapter-08.de.md b/slides/chapter-08.de.md
index 08bd04a..94854c6 100644
--- a/slides/chapter-08.de.md
+++ b/slides/chapter-08.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Aufzählungen
+8 Aufzählungen
@slide(layout=content-and-preview)
diff --git a/slides/chapter-08.en.md b/slides/chapter-08.en.md
index e67329d..2205321 100644
--- a/slides/chapter-08.en.md
+++ b/slides/chapter-08.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Enumerations
+8 Enumerations
@slide(layout=content-and-preview)
diff --git a/slides/chapter-09.de.md b/slides/chapter-09.de.md
index d021330..512dc15 100644
--- a/slides/chapter-09.de.md
+++ b/slides/chapter-09.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Mathematische Formeln
+9 Mathematische Formeln
@slide(layout=content-and-preview)
diff --git a/slides/chapter-09.en.md b/slides/chapter-09.en.md
index 3e7bae0..00ac8b7 100644
--- a/slides/chapter-09.en.md
+++ b/slides/chapter-09.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Typesetting mathematics
+9 Typesetting mathematics
@slide(layout=content-and-preview)
diff --git a/slides/chapter-10.de.md b/slides/chapter-10.de.md
index c48593c..69e8a8c 100644
--- a/slides/chapter-10.de.md
+++ b/slides/chapter-10.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Grafiken
+10 Grafiken
@slide(layout=content-only)
diff --git a/slides/chapter-10.en.md b/slides/chapter-10.en.md
index d78e893..8da4870 100644
--- a/slides/chapter-10.en.md
+++ b/slides/chapter-10.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Graphics
+10 Graphics
@slide(layout=content-only)
diff --git a/slides/chapter-11.de.md b/slides/chapter-11.de.md
index 922fab2..fa0a098 100644
--- a/slides/chapter-11.de.md
+++ b/slides/chapter-11.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Tabellen
+11 Tabellen
@slide(layout=content-only)
diff --git a/slides/chapter-11.en.md b/slides/chapter-11.en.md
index 7ca5144..f8908c3 100644
--- a/slides/chapter-11.en.md
+++ b/slides/chapter-11.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Tables
+11 Tables
@slide(layout=content-only)
diff --git a/slides/chapter-12.de.md b/slides/chapter-12.de.md
index ed2db74..f64e15a 100644
--- a/slides/chapter-12.de.md
+++ b/slides/chapter-12.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Quelltext-Listings
+12 Quelltext-Listings
@slide(layout=content-only)
diff --git a/slides/chapter-12.en.md b/slides/chapter-12.en.md
index ef62dc0..f0c94a8 100644
--- a/slides/chapter-12.en.md
+++ b/slides/chapter-12.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Source code listings
+12 Source code listings
@slide(layout=content-only)
diff --git a/slides/chapter-13.de.md b/slides/chapter-13.de.md
index 5c8479b..cf277e5 100644
--- a/slides/chapter-13.de.md
+++ b/slides/chapter-13.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Referenzen und Fußnoten
+13 Referenzen und Fußnoten
@slide(layout=content-and-preview)
diff --git a/slides/chapter-13.en.md b/slides/chapter-13.en.md
index 8cea915..74a5539 100644
--- a/slides/chapter-13.en.md
+++ b/slides/chapter-13.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-References and footnotes
+13 References and footnotes
@slide(layout=content-and-preview)
diff --git a/slides/chapter-14.de.md b/slides/chapter-14.de.md
index 0065f16..3291ca3 100644
--- a/slides/chapter-14.de.md
+++ b/slides/chapter-14.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Literaturverwaltung
+14 Literaturverwaltung
@slide(layout=content-only)
diff --git a/slides/chapter-14.en.md b/slides/chapter-14.en.md
index 9c51c42..367fb54 100644
--- a/slides/chapter-14.en.md
+++ b/slides/chapter-14.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Reference management
+14 Reference management
@slide(layout=content-only)
diff --git a/slides/chapter-15.de.md b/slides/chapter-15.de.md
index b27d2ac..4e678af 100644
--- a/slides/chapter-15.de.md
+++ b/slides/chapter-15.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Paket in Sicht!
+15 Paket in Sicht!
@slide(layout=content-and-preview)
diff --git a/slides/chapter-15.en.md b/slides/chapter-15.en.md
index 7e24423..926f161 100644
--- a/slides/chapter-15.en.md
+++ b/slides/chapter-15.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Package in sight!
+15 Package in sight!
@slide(layout=content-and-preview)
diff --git a/slides/chapter-16.de.md b/slides/chapter-16.de.md
index 2d41e56..af93bca 100644
--- a/slides/chapter-16.de.md
+++ b/slides/chapter-16.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Hilfe und Informationen
+16 Hilfe und Informationen
@slide(layout=content-only)
diff --git a/slides/chapter-16.en.md b/slides/chapter-16.en.md
index 965f17f..a1c5003 100644
--- a/slides/chapter-16.en.md
+++ b/slides/chapter-16.en.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Getting help and information
+16 Getting help and information
@slide(layout=content-only)
diff --git a/slides/intro.de.md b/slides/intro.de.md
index 0c0e60b..b17e95c 100644
--- a/slides/intro.de.md
+++ b/slides/intro.de.md
@@ -1,7 +1,7 @@
@slide(layout=chapter-slide)
@title
-Technik-Vorbereitung
+0 Technik-Vorbereitung
@content
TEST TEST
diff --git a/slides/intro.en.md b/slides/intro.en.md
index 6246447..ef971a2 100644
--- a/slides/intro.en.md
+++ b/slides/intro.en.md
@@ -114,7 +114,7 @@ Passing the flag ``--shell-escape`` to your compiler can be a potential security
@slide(layout=content-and-preview)
@title
-Change the listings mode
+0 Change the listings mode
@content
In order to compile the script using `minted`, the listings mode has to be changed.