Microsoft has updated the calendar section in Outlook with a cleaner look as well, which, according to the brand, should increase your productivity. There is also a Dark Mode to reduce strain on your eyes while looking at the app in dark environments. The new Outlook app uses more white space which offers a lighter look, new Fluent icons in the sidebar, and rounded window edges. The design team has also taken clues from macOS Big Sur to match the design of Outlook with that of the new OS. Starting with the design, the new Outlook app for Mac ditches the brand’s Ribbon design language and uses Microsoft’s new, Fluent design language. The updated email client brings a new UI design, more features, and better performance. Microsoft has showcased a new Outlook app for Mac.