Opening the Composite Application Perspective 

Procedure

...

       1.      Launch the SAP NetWeaver Developer Studio.

       2.      Choose Window → Open Perspective → Other.

You can also choose  with the quick info text Open a Perspective.

       3.      Select Composite Application from the list.

       4.      Choose OK.

The Composite Application screen opens and the Composite Application Explorer view is active.

Result

You can now begin creating a development component project.

More Information: Creating Composite Application Development Components.