New alignment tools in the Book module allow you to snap photos and text cells to a grid for more precise layouts.

You can now see "partially compatible" presets (which may contain profiles not native to your specific camera) as italicized text, ensuring your favorite presets don't simply "disappear". Performance and macOS Optimization

For the first time, users could rearrange the order of the panels in the Develop module. If your workflow always starts with "Lens Corrections" or "Calibration," you can drag those to the top and hide panels you rarely use.

This version leverages Metal on Mac for faster rendering in the Develop module. System Requirements for Mac