A Package is a container of model elements, and is displayed in the Project Browser window as the 'folder' icon familiar to Windows users. Package contents are arranged alphabetically.
In the Project Browser window click on a package and, in the Project Browser window toolbar, click on the New Package icon .
Enterprise Architect displays a prompt for the package name.
Type in a name and click on the OK button. Enterprise Architect adds the new package subordinate to the package you selected. Now add a diagram.