With flexibility in mind, we’ve changed fullscreen to present mode: a way to present with a clean doc surface and keep your browser in view.
Here’s how it works.
Click the horizontal “...” next to your doc title and select Present to hide your sidebar and comments.
You can use the arrows to toggle to the next or previous page. Or you can select a page from the drop-down to jump straight there.
You can switch between browser tabs. Or you can select to hide your browser by clicking the double arrows in the present mode controls.