Why do the dock and toolbar disappear?
I'm new to Catalina, which came with my new Air. I like to see the dock and toolbar (with clock) all the time, and that's how it was the first few days. Suddenly today both of them hide automatically. I've checked the settings for both, and the box for automatically hiding them is unchecked in both cases. But they keep hiding anyway. This is driving me nuts and wasting lots of time.
Likewise there was a sudden and inexplicable shift from white background, black letters to the opposite. I was able to fix that in settings. But the automatically hiding dock and toolbar will not stop.
Any ideas?
MacBook, macOS 10.13