After reading, if I understand correctly, the difference between ConfigP.Mnu and other menus is that ConfigP.Mnu is like setting the Bios before entering the operating system, setting whether to use which hardware or which to boot first, and what settings are needed, rather than specifying an execution sequence like a list, and the final end is execution. Like the meaning of general Windows program Options... or Properties... is a kind of environment setting, while the general list menu is like Edit->Copy or Edit->Paste in Windows programs, which is an execution sequence of an action.