Hmmm. That wasn't obvious from the camera's menu. I'll check the manual.
Ah! Got it. You have to use the touch panel to indicate the point of focus and activate the 5x magnification. I normally run with the panel reversed to protect the screen, and use the EVF so I don't need glasses to see the panel.
Yes, we have liftoff. I used the touch screen to activate 5x magnification, and could either touch the "+" or use the dial to increase it to 10x. Best of all, when I move my eye to the viewfinder, it automatically switches, and keeps the magnification mode. Neat.
[sigh] But I still miss the viewfinder of my old R7, or any SLR, for that matter. The experience isn't the same, even if I can make it work.