What happens when you hold Shift while using the Razor tool?

When you hold Shift while using the Razor tool in Premiere Pro, it enables cutting across all tracks. This functionality is particularly useful for editing multiple audio or video tracks simultaneously. By default, the Razor tool can cut only the selected track, but with the Shift key pressed, you ensure that all tracks that are visible in the timeline receive the same cut at the same point. This is especially beneficial when you want to maintain the synchronicity of clips across different tracks, such as when working with layered audio and video elements that need to stay aligned.