What is the purpose of the extract function in a timeline?

The extract function in a timeline is primarily designed to remove selected material from the sequence, effectively closing any gap that might be created by this removal. This operation is crucial in video editing, as it allows editors to streamline their projects by cutting unwanted content without leaving empty spaces that would disrupt the flow of the timeline.

When a section is extracted, it not only eliminates those clips but also shifts the remaining clips to fill the space that is created, ensuring that the pacing and narrative structure remain coherent. This is essential for maintaining the intended timing and rhythm of the sequence, allowing for a smoother viewing experience.

The other options either describe functions that do not align with the purpose of the extract function or pertain to different operations within the realm of video editing. For example, adding new elements relates to a different tool or function, while maintaining rhythm would align more with trimming or adjusting clips rather than extracting them. Highlighting clips also serves another function, typically for organization or emphasis rather than modification of the timeline.