It would be amazing to be able to set "screencast mode"-only settings.

For example, my editor.fontSize is set to 16, but when I'm presenting (in person or over video), I'd like the font size to be 20.

Since the config supposes [language] support, would it be possible to do something like the following?

{

  "editor.fontSize": 16,
  "terminal.integrated.fontSize": 16,

  "[screencast]": {
    "terminal.integrated.fontSize": 20,
    "editor.fontSize": 20
  }
 
}

This would open up to more configuration options such as setting the theme, font family, etc.