Customization of the user interface is done by modifying the XML-based customization (CUIx) file with the Customize User Interface (CUI) Editor.
You can edit customization (CUIx) files to make the following changes:
- Add, delete, or change user interface elements, such as ribbon tabs and panels, and Quick Access toolbars
 - Create or change workspaces
 - Create or change macros and tooltips for commands
 - Create or change double-click actions
 - Create or change keyboard shortcuts and temporary overrides
 - Control the properties displayed when using rollover tooltips and the Quick Properties palette
 - Create and load new CUIx files
 
Customizable User Interface Elements
The CUI Editor allows you to create and manage commands that are used to define the actions of a user interface element. After a command is defined, it can be used to create a button or a response to an action in the drawing area. You can customize
- Quick Access toolbar
 - Ribbon tabs
 - Ribbon panels
 - Ribbon contextual tab states
 - Toolbars
 - Pull-down menus
 - Quick properties
 - Rollover tooltips
 - Shortcut menus
 - Keyboard shortcut and temporary override keys
 - Double click actions
 - Mouse buttons
 - Workspaces
 - Legacy user interface elements (tablets, tablet buttons, and image tile menus)