You can enable the Filmstrip mode by clicking on the Show Filmstrip button:
Filmstrip in Edit is a feature within the Edit tab that allows users to quickly switch between images without needing to exit Catalog mode. This feature keeps the editing process seamless by enabling users to browse through their photo collection while staying in the editing workspace. It also supports quick synchronization of edits across multiple images, improving workflow efficiency and productivity by minimizing interruptions and focusing on image editing.