diff -r a8a2b5d5421c -r 701af897de95 web/js/renkan.js
--- a/web/js/renkan.js	Thu Oct 24 18:48:39 2013 +0200
+++ b/web/js/renkan.js	Fri Oct 25 01:52:53 2013 +0200
@@ -785,6 +785,8 @@
     force_resize: false,
     allow_double_click: true,
         /* Allows Double Click to create a node on an empty background */
+    zoom_on_scroll: true,
+        /* Allows to use the scrollwheel to zoom */
     element_delete_delay: 0,
         /* Delay between clicking on the bin on an element and really deleting it
            Set to 0 for delete confirm */
@@ -2642,9 +2644,11 @@
             _this.onMouseUp(_event, false);
         },
         mousewheel: function(_event, _delta) {
-            _event.preventDefault();
-            if (_allowScroll) {
-                _this.onScroll(_event, _delta);
+            if(_renkan.options.zoom_on_scroll) {
+                _event.preventDefault();
+                if (_allowScroll) {
+                    _this.onScroll(_event, _delta);
+                }
             }
         },
         touchstart: function(_event) {