Ideally you'd have an external webcam that you could point at the Pixl (unless you could use an external keyboard and angle your Mac to point at it?).
But then you go to the IDE, Settings, General, Webcam Icon -> Yes
If you're doing it on a white background you could choose to add 50% brightness to make it look a bit more vibrant. I also put the font size up to 24 or so so people can see it.
But then you just click the webcam icon on the left of the terminal and it'll show the webcam in the background of the terminal. Make sure you refresh the page as newer IDE versions stretch the webcam to fit the screen, which looks much better. If you've clicked in the terminal, Ctrl-F will also make it fullscreen in the window so you're not displaying the editor.
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