Pick a background color for streaming: For apps that can't do Spout2 (TikTok Live Studio, Discord, capture cards), the see-through background showed up as black, and keying black out also erased dark clothing. Stream mode now has a color picker next to the camera button: choose green, blue, or magenta and key that out instead. OBS users can leave it on transparent; nothing changes.
The stream button gets out of your shot: The camera button and the picker fade out in stream mode so they don't show up in your capture. Rest your cursor on the top-left corner to bring them back. F9 still exits stream mode.