Mackie, Master and Monitor

I have noticed that the Master slider of my (Mackie compatible) Zoom R24 now controls the Monitor Volume. This makes sense, but is there a way to get the old behaviour (controlling the Master strip)?

Don’t use the monitor section? Huh, the manual doesn’t give much info and I don’t remember it all. I know the function keys allow changing which strips the channel faders control, It may be possible to control the master from there as well. I have not played with it for a while.