Click the ConfigurationManager tab 
to change to the ConfigurationManager.
Right-click the name of the configuration you want to view and select Show Configuration.
To activate a different configuration:
Click the ConfigurationManager tab to change to the ConfigurationManager.
Right-click the name of the configuration you want to view and select Show Configuration.
- or -
Double-click the configuration name.
The named configuration becomes the active configuration, and the view of the model updates to reflect the newly selected configuration.