Turns out it's a separate control, not enabled by default. Only took me three web searches to find that out, and find out how to find the configuration UI for t

Turns out it's a separate control, not enabled by default. Only took me three web searches to find that out, and find out how to find the configuration UI for the control strip so I could replace the default controls with the swipeable ones. I don't know. Maybe you're right. Maybe I was wrong to assume that Apple knows how to build discoverable user interfaces. I guess I should've spent a lot more time reading manuals and dinking around with the keyboard on this machine, instead of letting myself be distracted with trivialities like building software, solving problems, and getting work done.