“Set As Project Main Module” questions – MuTools Forum

I have the following setup:
–> Project Mux Modular
—-> Mux Modular 1
——–> Composer 1
—-> Mux Modular 2
——–> Composer 2

I noticed the I cannot set the Project Mux Modular as the Main Module (as the option does not appear when I tap the gear icon for the Project Mux Modular) but I can set the child Mux Modulars or the Composers inside them as Main Modules. Why is that?

This isn’t the end of the world (as I can obviously keep a small window with the Project Mux Modular open), but I’m trying to figure out what the reason for this is.

Perhaps the best question here is: besides deciding which one is the main window, does the “Set As Project Main Module” functionality do anything else?

Thanks!