This video is 2 minutes long and shows how a newly created session with no personnel can import personnel from another session. This is a convenient BRIAN shortcut. There are many times when the same personnel appear on multiple sessions. Rather than reentering them for each session, you can import from another session.
This video shows importing from a session where the personnel match exactly. Even if the personnel does not match exactly, it is still sometimes easier to import and then make the additions or removals as necessary.
The video shows BRIAN used on a Mac, but the Windows version is very similar. Windows users should have no trouble seeing the correlation. The biggest difference between the Mac and Windows version is that Mac uses a dedicated menu bar at the top of the screen while the Windows version has the menu bar integrated into each window.