diff --git a/lib/timeline/Core.js b/lib/timeline/Core.js
index ca44109b..d816ce38 100644
--- a/lib/timeline/Core.js
+++ b/lib/timeline/Core.js
@@ -323,6 +323,41 @@ Core.prototype.clear = function(what) {
   }
 };
 
+/**
+ * Set Core window such that it fits all items
+ * @param {Object} [options]  Available options:
+ *                            `animate: boolean | number`
+ *                                 If true (default), the range is animated
+ *                                 smoothly to the new window.
+ *                                 If a number, the number is taken as duration
+ *                                 for the animation. Default duration is 500 ms.
+ */
+Core.prototype.fit = function(options) {
+  // apply the data range as range
+  var dataRange = this.getItemRange();
+
+  // add 5% space on both sides
+  var start = dataRange.min;
+  var end = dataRange.max;
+  if (start != null && end != null) {
+    var interval = (end.valueOf() - start.valueOf());
+    if (interval <= 0) {
+      // prevent an empty interval
+      interval = 24 * 60 * 60 * 1000; // 1 day
+    }
+    start = new Date(start.valueOf() - interval * 0.05);
+    end = new Date(end.valueOf() + interval * 0.05);
+  }
+
+  // skip range set if there is no start and end date
+  if (start === null && end === null) {
+    return;
+  }
+
+  var animate = (options && options.animate !== undefined) ? options.animate : true;
+  this.range.setRange(start, end, animate);
+};
+
 /**
  * Set the visible window. Both parameters are optional, you can change only
  * start or only end. Syntax:
diff --git a/lib/timeline/Timeline.js b/lib/timeline/Timeline.js
index 3da5da66..c688bfaf 100644
--- a/lib/timeline/Timeline.js
+++ b/lib/timeline/Timeline.js
@@ -197,41 +197,6 @@ Timeline.prototype.getSelection = function() {
   return this.itemSet && this.itemSet.getSelection() || [];
 };
 
-/**
- * Set Timeline window such that it fits all items
- * @param {Object} [options]  Available options:
- *                            `animate: boolean | number`
- *                                 If true (default), the range is animated
- *                                 smoothly to the new window.
- *                                 If a number, the number is taken as duration
- *                                 for the animation. Default duration is 500 ms.
- */
-Timeline.prototype.fit = function(options) {
-  // apply the data range as range
-  var dataRange = this.getItemRange();
-
-  // add 5% space on both sides
-  var start = dataRange.min;
-  var end = dataRange.max;
-  if (start != null && end != null) {
-    var interval = (end.valueOf() - start.valueOf());
-    if (interval <= 0) {
-      // prevent an empty interval
-      interval = 24 * 60 * 60 * 1000; // 1 day
-    }
-    start = new Date(start.valueOf() - interval * 0.05);
-    end = new Date(end.valueOf() + interval * 0.05);
-  }
-
-  // skip range set if there is no start and end date
-  if (start === null && end === null) {
-    return;
-  }
-
-  var animate = (options && options.animate !== undefined) ? options.animate : true;
-  this.range.setRange(start, end, animate);
-};
-
 /**
  * Adjust the visible window such that the selected item (or multiple items)
  * are centered on screen.