Which tool is typically used to trim clips in the timeline?

The Razor tool is specifically designed for cutting clips in the timeline, enabling editors to create separate segments from a single clip. When using the Razor tool, an editor can make precise cuts at specific points, allowing for greater flexibility in arranging and trimming content within a project. This functionality is crucial for editing audio and video segments as it lets the user split a clip into distinct parts that can be moved or edited independently.

The other tools mentioned do not serve the same purpose as the Razor tool. The Selection tool primarily allows for selecting and moving clips without altering their length. The Trim tool focuses on adjusting the in and out points of a clip without having to cut it, and the Ripples tool is a feature typically associated with adjustments that cause subsequent clips to shift accordingly but is not used to perform the cutting action itself. Therefore, the Razor tool is the most relevant and effective for the purpose of trimming clips in the timeline.