In the support document, Apple says users can turn on “scale to fit built-in camera” for an app to adjust the active area of the screen, ensuring that items in the Application menu bar appear below the notch and are always visible.
The menu bar items appearing hidden behind the notch were demonstrated by Quinn Nelson, host of the Snazzy Labs YouTube channel.
To enable “scale to fit built-in camera” for an app on newer MacBook Pro models, open the Finder app and click Applications in the sidebar. Then right click on the desired application and select “Get Info”. In the information window that opens, check the box “scale to fit built-in camera” and the display will automatically adjust when the application is opened.
The setting was demonstrated in a tweet from Joseph Angelo Todaro, a design advocate for Sketch.
Apple notes that developers can update their app to work better with the notch, in which case the “Scale to fit under built-in camera” setting no longer appears.