# Safari Technology Preview 231 Release Notes Learn about the latest web technology updates in Safari Technology Preview: CSS, JavaScript, Media, Rendering, Web API, Web Inspector, and WebDriver. ## Overview [Safari Technology Preview](https://webkit.org/blog/6017/introducing-safari-technology-preview/) Release 231 is now [available for download](https://developer.apple.com/safari/resources/) for macOS Tahoe and macOS Sequoia. If you already have Safari Technology Preview installed, you can update it in System Settings under General → Software Update. This release includes WebKit changes between: [300987@main…301765@main](https://github.com/WebKit/WebKit/compare/34584723de5b46e01b218df327f43ebd3afb9028...9018757c64f271d2e19408850182e6b841159b53). ### CSS #### New Features - Added support for the `safe` keyword with `anchor-center` in CSS Anchor Positioning. ([301301@main](https://commits.webkit.org/301301@main)) (155767796) - Added support for `flip-x` and `flip-y` options in `position-try-fallback` for CSS Anchor Positioning. ([302057@main](https://commits.webkit.org/302057@main)) (163282036) #### Resolved Issues - Fixed handling of padding and margins for flex and grid layouts across all writing modes. ([301814@main](https://commits.webkit.org/301814@main)) (71046552) - Fixed `position-visibility: no-overflow` to respond correctly to scrolling. ([301211@main](https://commits.webkit.org/301211@main)) (162173481) - Fixed: Renamed `position-area` keywords from `x-self-start`, `x-self-end`, `y-self-start`, and `y-self-end` to `self-x-start`, `self-x-end`, `self-y-start`, and `self-y-end` respectively to align with updated CSSWG specifications.([301226@main](https://commits.webkit.org/301226@main)) (162214793) - Fixed `