Mirroring Displays in Monterey

I wonder whether anybody else is experiencing problems when trying to mirror displays. I have an imac and 2 external displays. When I used Catalina it was very easy to mirror or un-mirror the displays (meaning I could save energy and switch off the additional screens if I didn't need them). Since upgrading to Moneterey I find that the button to "mirror displays" has been removed and there's a long winded procedure involving pressing option and dragging each monitor on top of the other. It takes a while and un-mirroring seems to be even more difficult as the displays come out in the wrong order.

Anybody else struggling with this?

Tony