diff --git a/_quarto.yml b/_quarto.yml
index 4289889..20fbc8e 100644
--- a/_quarto.yml
+++ b/_quarto.yml
@@ -7,8 +7,9 @@ project:
 
 format: 
   html:
-    echo: false
+    code-fold: true
   docx:
     echo: false
   pdf:
     pdf-engine: tectonic
+    echo: false