There are different ways to switch between all available perspectives including those of data services and service Routes.
To switch between different perspectives:
In the upper right corner of the main window of Talend Studio, click the icon and Other... to display the [Open Perspective] dialog box.
Select the perspective you want to access, Mediation for example, and click OK to close the dialog box.
Alternatively, you can switch between different perspectives by:
clicking Window > Perspective and selecting the perspective to open from the menu.
Directly clicking the corresponding icon, when available, on the upper right corner of the main window.
For more information on how to manage the display of these icons, see Managing quick access icons for different perspectives.