Changing Primary Monitor on Dual-Monitor System

[Laisha]

For no apparent reason, when I booted my Mac Mini up this morning, only one of my two monitors was recognized.

Not a problem, right? I went to system preferences : Display and put the other one in.

But for the same non-reason, the left monitor was on the right and the right one was on the left. So I fixed that as well.

Problem is this: It has made the wrong monitor my primary. I tried to use my machine like this, but I'm old and a creature of habit. I can't find anything in Display to change the primary monitor on a dual-monitor system.

Help, please!

 

[triptolemus]

Under System Preferences, Display, Click Arrangement, then drag the white bar -- which is a representation of the Menu Bar -- to the desired monitor.

 

[Laisha]

Thank you so much! That sure was much simpler than I had anticipated!

I plead old age!