Customizing the metamodel : Metamodel graphical editor : Creating user definition chapters
  
Creating user definition chapters
In order to add your User Definition Properties to the User Definition Type you will need to create a User Definition Chapter. The Chapters will indicate that these User Definition Properties belong to the User Definition Type.
To create a user definition chapter
1 From the Explorer, right-click the Definitions group and select New Definition or select Dictionary > New Definition.
2 Select User Definition Chapter and name it. The example below uses “Book Information”.
3 Under the User Definition Type property, click Choices. Drag in the User Definition Type, such as Book.
4 Under the Properties tab, click Choices.
Drag in each User Definition Property that you want to appear in the User Definition Type. In the example below, all the User Definition Properties that were created for the User Definition Type called Book have been selected.
User DefinitionChapter definition
5 Select OK to close the dialog.
See also
Adding a user definition chapter to a user definition type