Which feature allows you to control properties like opacity or volume through keyframes?

The feature that allows you to control properties like opacity or volume through keyframes is the rubber band. In Adobe Premiere, the rubber band refers to the visual representation of keyframe changes in audio or video tracks. By using the rubber band, users can adjust properties directly in the timeline by dragging the line that represents the level of a property such as volume or opacity.

When you add keyframes on the timeline, the rubber band visually indicates where those changes occur. As you move between keyframes, you can create smooth transitions for effects like fading in or out. This provides a hands-on method of editing, allowing for precise control over the gradual changes in effects over time, which is invaluable for achieving a professional finish in video editing.

In contrast, clip effects refer to the various effects that can be applied to clips but do not inherently manage the gradual changes of properties through keyframes. Time indicators are simply markers for position in the timeline, providing a reference point but lacking any direct manipulation of properties. Markers are used for navigation and organization within a project but do not control or adjust properties like opacity or volume. They serve different purposes in the editing workflow and are not related to the gradual transitions achieved through keyframing.