What is the primary function of sync locks in a video editing timeline?

The primary function of sync locks in a video editing timeline is to maintain the alignment of clips across multiple tracks. When sync locks are engaged, any movement or adjustment made to one clip will also apply to other clips that are locked together, ensuring that their timing remains consistent. This feature is particularly important in situations where audio needs to stay aligned with video, or when multiple elements must maintain their relative timing to avoid losing the intended synchronization.

Using sync locks helps editors manage complex timelines efficiently, as they can move sections of the timeline without worrying about desynchronizing related clips. The functionality is designed to preserve the relationships between elements, making it a vital tool for maintaining coherence in a project's overall structure.

In contrast, the other options represent functions or concepts that do not align with the specific purpose of sync locks. For example, preventing clips from being moved together or focusing solely on sync between audio and video tracks are not the comprehensive role of sync locks.