diff --git a/templates/html_header.md b/templates/html_header.md
index 1467723..fee3a1b 100644
--- a/templates/html_header.md
+++ b/templates/html_header.md
@@ -1,6 +1,8 @@
-theme: sky
+theme: simple
 width: 1824
 height: 1026
-maxScale: 0.85
+maxScale: 0.81
 margin: 0.02
 progress: true
+showNotes: false
+pdfSeparateFragments: false