What should you do to make a subclip from an existing clip?

To create a subclip from an existing clip, you need to define the specific section of the original clip that you want to isolate and work with. This is achieved by marking an in and out point, which indicates the start and end of the desired segment. After setting these points, selecting "Make Subclip" allows you to generate a new clip that contains only that specified portion, effectively creating a subclip.

This method is essential because it precisely pinpoints the segment of interest in the original clip while maintaining the integrity of the full-length clip. It also simplifies the editing process by allowing you to handle only the relevant portion without altering the original footage.

Choosing to duplicate the clip would not specifically isolate a segment; rather, it would simply create a copy of the entire clip. Placing it directly into the timeline does not modify or create a subclip, as this action does not define a smaller section. Editing attributes of the clip through right-clicking does not contribute to creating a subclip, as it focuses on altering properties rather than isolating content. Therefore, marking an in and out point followed by selecting "Make Subclip" is the correct approach for this task.