Media players often offer a feature which allows the viewer to see details about the broadcast they are viewing.
For example, these can be seen in QuickTime Player under "Get Movie Properties" menu item in the "Movie" menu. Select "Movie" than "Annotations" to see the details.
These Annotations can be configured for your broadcast in Wirecast.
When you configure annotations, they apply for all streams at the same time. This means changing your annotations is very easy when you have multiple streams.
To configure the annotations, open up the "Broadcast Settings" window, which you'll find in the "Broadcast" menu (or Command-Y).
Select "Annotations" from the tab.
Configuring Annotations
This is what the annotations window looks like:
Title
This is the title of the broadcast.
Author
This is the author of the broadcast.
Copyright
This is any copyrights that are on the broadcast.
Info
This is any additional info you'd like to associate with the broadcast.