Customization Guide (.pdf) - Documentation & Online Help - Autodesk

Quick Reference
Commands
CUI
Manages the customized user interface elements in the product.
How Customization Has Changed
Although the basic customization techniques remain the same as in previous
versions of the product, the environment that you use to customize the product
was changed starting with AutoCAD 2006.
All of the previous customization options are still available. You are still able
to create, edit, and delete interface elements; you can create partial
customization files; you can use macros and DIESEL expressions.
However, you no longer perform customization tasks by creating or editing
MNU or MNS text files by hand. All customizations are done through the
program interface, in the Customize User Interface (CUI) Editor.
Menu Files Versus Customization Files
In releases prior to AutoCAD 2006, you customized the user interface by editing
an MNU or MNS file in an ASCII text editor such as Notepad. You manually
entered and verified customization data in the text file, which could be a
tedious and error-prone process. As a result, a simple syntax error (such as
mismatched parentheses) in the text file could invalidate the entire menu file,
leading you back to the text file to investigate where you made the error.
With the Customize User Interface (CUI) Editor, you drag a command to a
menu or toolbar or right-click to add, delete, or modify a user interface element.
The Customize User Interface (CUI) Editor displays element properties and a
list of options to choose from. This prevents you from creating syntax errors
or spelling mistakes that may have occurred when you manually entered text
in an MNU or MNS file.
The MNU and MNS files used in the past have been replaced with just one
file type, the XML-based CUIx file. CUIx is the successor to the CUI file format
which was introduced in AutoCAD 2006.
The XML-based format of the CUIx file allows the product to track
customizations. When upgrading to a future version of the program, all of
your customizations are automatically integrated into the new release. The
XML format also supports a backward-compatible customization file. This
48 | Chapter 4 User Interface Customization