md`## Interface improvements If you no longer want your unpublished changes, you can now revert your notebook to its published state: choose Revert from the header’s notebook menu . You can likewise revert unshared changes to shared notebooks. To make it easier to dispose of unwanted notebooks, we’ve added a Trash option. (As before, you can also trash your notebooks from any listing.) These changes are only a small step towards better nondestructive editing of notebooks; stay tuned! [Giving a presentation?](/@mbostock/slide) Try the new Fullscreen mode, also in the notebook menu. This uses the [fullscreen API](https://developer.mozilla.org/docs/Web/API/Fullscreen_API) to make your notebook content fill the screen. (You can also use your browser’s built-in fullscreen mode, which limits the content to the center column to allow access to the margin’s editing controls.) For notebooks that use experimental features, such as [asynchronous iteration](/@mbostock/introduction-to-asynchronous-iteration) and [arbitrary-precision integers](/@tmcw/solving-project-euler-20-with-bigints), we now display a helpful warning to readers whose browser does not support the needed feature. Lastly, we’ve upgraded to the [0.10.0-beta release of ${tex`\KaTeX`}](https://github.com/Khan/KaTeX/releases/tag/v0.10.0-beta) and tweaked the font size for better readability when mixing math and prose.`