The Model Extensions tab contains all Stereotypes that are predefined and created manually in the project. In this tree, you can create, review, copy/paste, and delete extension mechanisms.

To open the Model Extensions tab, do one of the following

• At the top of the Model Browser, click the Model Extensions tab.

• If the Model Extensions tab is hidden, from the Window menu, select Model Extensions
  

  You can change some Model Extensions tab properties in the Environment Options dialog the Browser options group.

Model Extensions tab consists of the following two components:

• Model Extensions tab toolbar

• Model Extensions tree

Model Extensions tab toolbar

Model Extensions tab toolbar contains the following buttons:

Button	Tooltip text	Description
	Collapse All	Collapse all of the currently elements in the Containment tree.
	Collapse Selected Recursively	Collapses only selected node and all subnodes in that node.
	Group by Profiles	Groups extensions by the profiles.
	Group by Metaclasses	Groups extensions by the metaclasses.
	Favorites	Opens the Favorites menu for choosing to do one of the following: Add a selected element to favorites Open the dialog for managing favorites Navigate to a desired favorite in the Containment tree
	Quick Find	Opens the Quick Find dialog.

The same actions you may perform using the shortcut menu of the Model Extensions tree.

Working with model elements in the Model Extensions tree

You can work with elements in the Model Extension tree using the commands available from the selected element's shortcut menu.