Just installed a Roku Streaming Stick 4K. Its remote controls my TV: on/off, & vol. But I can't figure out how to use the remote to go back to regular TV mode. I still have to use the TV remote to do that. What am I missing?
You're not missing anything. Don't you have to pick up the TV remote once it's back in regular TV mode anyway?
If the TV always powers up in regular TV mode you could just cycle the power to get it back to regular TV mode and then use the "1-touch play" option on the Roku device to get it to the Roku's input.