diff --git a/index.html b/index.html
index 15df34c..35b43aa 100644
--- a/index.html
+++ b/index.html
@@ -628,15 +628,6 @@ function fold_initial() {
     fold_set_state(state);
     return;
   }
-  var slides = document.getElementsByClassName("head");
-  for (var i = 0; i < slides.length; i++) {
-    var el = slides.item(i);
-    var rect = el.getBoundingClientRect();
-    if (window.innerHeight * 1.5 < rect.top) {
-      var name = el.id.replace("head_", "");
-      fold_toggle(name);
-    }
-  }
 }
 
 function fold_get_state() {
@@ -691,6 +682,7 @@ var config = {
   search: true, // include search bar
   style: null, //  file to load css from
   favicon: null, //  link to favicon file
+  foldCategories: true
 };
 // TEMPLATED:HIGHLIGHT_CODE
 // TEMPLATED:CONFIG