Creating a Subelement in the Model Structure

You can create subelements in the Model Structure tool window using commands in the ribbon or context menu.

Context

New subelements generally need to be assigned to an owner. These are packages in the simplest case.

The configuration sets whether a model element can be an owner of a subelement.

If you do not select a model element, a dialog appears which contains a list of possible owners.

A message appears if a model element cannot be an owner.

How to proceed

Select the model element in the model structure which you want to assign the new element to.
Select Start>New>New Subpackage.

The subelement is created below the selected model element and the name is automatically selected to be edited.
Enter the name of the subelement and press the [Enter] key.
If you want to use the subelement in a diagram, then drag it and drop it in the diagram.