diff --git a/Makefile b/Makefile
index 128c1f084e5bfd1cc6b6a941862bebb5e2922348..ae4328b065e9de26368f00b7ac0ca679cb2b45c1 100644
--- a/Makefile
+++ b/Makefile
@@ -24,6 +24,7 @@ subnotebooks: $(SUBNOTEBOOKS)
 	patch --silent --unified --input=fzj-reveal.js/patch-02--add-fzj-css.patch --output=$(_TMPFILE2) $(_TMPFILE1) && mv $(_TMPFILE2) $(_TMPFILE1)
 	patch --silent --unified --input=fzj-reveal.js/patch-03--modify-canvas.patch --output=$(_TMPFILE2) $(_TMPFILE1) && mv $(_TMPFILE2) $(_TMPFILE1)
 	patch --silent --unified --input=patch-00--add-fzj-reveal-subdir.patch --output=$(_TMPFILE2) $(_TMPFILE1) && mv $(_TMPFILE2) $(_TMPFILE1)
+	patch --silent --unified --input=patch-01--add-ah-css.patch --output=$(_TMPFILE2) $(_TMPFILE1) && mv $(_TMPFILE2) $(_TMPFILE1)
 	mv $(_TMPFILE1) $@
 
 %.pdf: %.html $(DEP_PRESENTATION)
diff --git a/custom.css b/custom.css
new file mode 100644
index 0000000000000000000000000000000000000000..3311bd7cf6972d42d66ecceba5380328089f2646
--- /dev/null
+++ b/custom.css
@@ -0,0 +1,13 @@
+.reveal h2 {
+    margin-top: 15px !important;
+}
+
+.reveal pre {
+    font-size: 70% !important;
+}
+span.task {
+    font-size: 2rem;
+    position: absolute;
+    right: 10px;
+    top: 10px;
+}
diff --git a/fzj-reveal.js b/fzj-reveal.js
index a31cc55bef923f4388693b0340af0607ff1427bf..ec500aa680d7d64d09ecc9fffe8475105ef98a8c 160000
--- a/fzj-reveal.js
+++ b/fzj-reveal.js
@@ -1 +1 @@
-Subproject commit a31cc55bef923f4388693b0340af0607ff1427bf
+Subproject commit ec500aa680d7d64d09ecc9fffe8475105ef98a8c
diff --git a/patch-01--add-ah-css.patch b/patch-01--add-ah-css.patch
new file mode 100644
index 0000000000000000000000000000000000000000..31e1e4d0a114ae47582c0e22a37c83ca36a58d27
--- /dev/null
+++ b/patch-01--add-ah-css.patch
@@ -0,0 +1,10 @@
+--- /dev/null	2021-06-02 15:02:18.000000000 +0200
++++ /dev/null	2021-06-02 15:02:43.000000000 +0200
+@@ -14,6 +14,7 @@
+ <link rel="stylesheet" href="fzj-reveal.js/reveal.js/dist/reveal.css">
+ <link rel="stylesheet" href="fzj-reveal.js/reveal.js/dist/theme/simple.css" id="theme">
+ <link rel="stylesheet" href="fzj-reveal.js/custom.css" id="custom">
++<link rel="stylesheet" href="custom.css" id="custom">
+ 
+ <!-- If the query includes 'print-pdf', include the PDF print sheet -->
+ <script>