Apple finally brings the slider for Liquid Glass and many other changes

Apple has updated its Liquid Glass design language by bringing a new slider and uniform window corners.

Apple kicked off the official live stream of the WWDC 2026 annual developer event. The company began its latest wave of announcements with changes to the controversial Liquid Glass design language, which debuted last year across Apple's entire software ecosystem.

A lot of people didn't like Liquid Glass when it first arrived on iPhone and other devices last year. The devices were plagued with transparency issues and whatnot. While Apple improved things over the year, it has now added a new Liquid Glass slider that lets you switch the transparency from clear to opaque.

In other words, you can choose how much Liquid Glass you want to see on your iPhone, rather than an on/off switch that would only give you two choices.

On macOS, the sidebars now expand to the edge of the window. When you scroll the UI sideways, the refraction continues beneath the sidebar rather than being cut off at the boundary. Moreover, sidebar icons regain their color, making it easier to distinguish between apps and identify which window is active in the foreground.

Apple has changed the way Liquid Glass is rendered across the system. There is a separation between different layers, which makes buttons in the toolbar stand out from the background. The update brings a uniform toolbar across the top of apps, and every window on macOS now has the same corner radius.

Apple said it "deeply appreciates" the feedback it received from users and has made adjustments to Liquid Glass. New customizations allow Liquid Glass to improve contrast and enable a more vibrant appearance. The new icons have sharper edges, which addresses an old complaint that iOS 26 icons look blurry at smaller sizes.

The upgraded Liquid Glass, Apple said, is building on last year's design upgrades by "integrating additional layers of Liquid Glass directly into the artwork itself." Apple's upgraded design language is available on iOS 27, which is arriving this year with no changes to the list of supported iPhones.