(It is also possible to invert MAIN and CUE roles : Cue as master, Main as submix.
Advantage : possible to use Level as fx sends with scenes. I tried it sometimes but it warps my head !)
Studio or Normal mode. Same levels.
Only differences between Studio and Normal modes are display, and common mutes vs individual mutes.
Studio mode display is better, but in some cases I like to mute Main and Cue individually, quicker than Main and Cue Level changes !