diff --git a/js/trackView.js b/js/trackView.js
index <HASH>..<HASH> 100755
--- a/js/trackView.js
+++ b/js/trackView.js
@@ -116,7 +116,8 @@ var igv = (function (igv) {
                 target;
 
             self.igvTrackDragScrim = $('<div class="igv-track-drag-scrim">')[0];
-            $(self.trackDiv).append(self.igvTrackDragScrim);
+            //$(self.trackDiv).append(self.igvTrackDragScrim);
+            $(self.viewportDiv).append(self.igvTrackDragScrim);
             $(self.igvTrackDragScrim).hide();
 
             self.igvTrackManipulationHandle = $('<div class="igv-track-manipulation-handle">')[0];
Issue <I>. Drag & drop. Track drag scrim now child of viewport.