diff --git a/src/viewer.js b/src/viewer.js
index 71c1a75b..39e1a7b6 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -474,8 +474,10 @@ $.Viewer = function( options ) {
                 options:            this.drawerOptions,
             });
             this.drawerOptions.constructor = Drawer;
+            // TO DO: add an event that indicates which drawer was instantiated?
             break;
         }
+        // TO DO: add an event that indicates that the selected drawer could not be created?
     }