My Moto G5 allows me to change the brightness when adaptive brightness is on.
How does that work? Is the brightness adjustment applied ‘on top of’ the automatic value from then on? Or does it revert to the automatic value after a certain time, or if the ambient light level changes, or what?
I can't see a reasonable way that could behave without risking other issues.
Seems reasonable to me, but then I'm used to the behaviour with this phone. Maybe I'm missing something.
It's hard to measure with one's eyes but I think it works in the first way you propose: Dark room, turn on bedside light brightness goes up. Turn it off, brightness down. 'Manually' increase brightness a bit. Light on, brightness up. Light off, brightness back to what it was (as close as I can tell).