Select Project 16
Makes Project 16 the current project. What is project 16? Who knows? Is there an order to projects? Who knows? All mentions of having multiple projects open at the same time complain about inconsistent behavior and corruption happening to projects.
Just don’t do it.
Scouring the Logic 7, 8, 9, and X manuals provides no useful information about working with multiple projects simultaneously.
Open Logic Pro projects — Apple Support
In Logic Pro, choose the project name at the bottom of the Window menu. The active project is marked with a checkmark.