Once in the **Localization Perspective**, menus can be modified by going to the **D2D** > **Menus** directory in the File Browser. Here there are submenus for different data types and menu structures. Usually the **index.xml** file found in these submenus is the *master* file which the actual menu is based off of. This file can reference other xml files and you may have to modify these *child* xml files to get the results you are looking for.
In order to modify any file, you must right click on it and
select **Copy To > USER (my-username)**. Then you may open this copy and begin to modify it. Once this process has been completed and a change has been made and saved, CAVE will need to be restarted and opened in the D2D perspective to see the change.
This example covers how to add a new menu entry to an existing menu.
1. Switch to the **Localization Perspective**
2. Find the **grid** folder under **D2D** > **Menus**
3. Double-click to expand **index.xml**
4. Right-click to **BASE (common_static)** and select **Copy To...**, then select **USER** level
5. Double-click **USER** to open the editor and copy an existing include tag, and update the *modelName* (this must match an existing product found in the Product Browser) and the *menuName* (this can be anything)
With this completed, you can now restart CAVE and will not see the MRMS menu anymore. Repeat this example for other product menus, such as **radar**, **upperair**, **tools**, etc., to further customize D2D data menus for any level of localization.