How can you add a keyframe to a selected clip?

Adding a keyframe to a selected clip in video editing is essential for creating smooth animations and transitions. The most effective method involves toggling the animation tool and using the keyframe button. This option directly engages with the clip's properties that you want to animate, allowing you to specify where changes occur over time within the timeline. By enabling the animation, you unlock the ability to manipulate various attributes of the clip, such as position, scale, or opacity, and the keyframe button is the tool that facilitates marking these specific moments in time.

Other methods, while they may seem plausible, do not provide the same level of intuitive control or functionality needed for precise animation. For example, simply pressing K does not inherently add a keyframe but is associated more with other commands in the editing software. Similarly, dragging the playhead and tapping the spacebar is related to playback functions rather than keyframe creation. Finally, selecting "Add Keyframe" from a menu might also work, but using the animation tool with a dedicated button is generally more straightforward and efficient for quickly adding keyframes to a selected clip.