---
title: Optimizely UI
slug: cms-12/docs/pluggable-ui
docTags: 
createdAt: 2026-08-10T15:55:56.000Z
---

The Optimizely user interface is component-based and pluggable, letting you add customized gadgets to both the left and right panes in the edit view and the dashboard. The user interface framework is based on a server-side part using ASP.NET MVC, and a client-side part using the JavaScript library Dojo. You can also add plug-ins to the admin menu.

- Support for drag-and-drop functionality based on the DND system in Dojo.
- Extendable navigation for easy access to customized modules from the top menu.
- Support for Dojo Toolkit, including Dijit for widgets.
- The same user interface framework is used across platform parts.

See also [User interface](docId:9cMHfxC6_An3RLyiecGDn) and [Drag-and-drop](docId\:UpuX7A2-sRsMhWAm1H3vz).