How to add a theater mode button

[geosigno]

It could, in fact, be for any button. I am looking for a way to easily add a custom button to the control bar, between the settings and PiP buttons, for example.

[luwes]

The best way to do this is to modify the default theme.
I put together an example here:
https://codesandbox.io/p/devbox/player-style-react-template-forked-rxtzjk?file=%2Fsrc%2FApp.jsx%3A719%2C45&workspaceId=ws_4oiUp7kyf42YNzonAeR4qQ