Select Next Project

You can have multiple projects open at the same time. Typical advice is to not do this. Which project is “next”? The behavior is not documented anywhere, as well as a lack of documentation describing how projects are numbers — see the ‘Open Project nn’ commands.

Open Logic Pro projects — Apple Support

You can open an existing project to continue working. You can also open several projects simultaneously, allowing you to copy or move data between them, or to compare different versions of a project.