Same. It's a real joy if you have a good table. It's more work though, which makes DMing a bad table that much more painful.

I have an old laptop that does that and the keys are very distracting whenever I hold it in tablet mode. I find myself holding it awkwardly on one side to avoid them, even though I know they're disabled. It is still a nice feature though, I like being able to transition a laptop to portrait mode sometimes.

I didn't know this was a thing. tyvm.

I do this too, usually because I've run across an odd word choice or turn of phrase. I am way less accurate though.