Copying Clips by Option-Dragging
Copying by Option-dragging provides a fast, visual way to duplicate a clip in a new
location. There is no need to position the playhead.
To copy a clip into another location in the Timeline by dragging:
In the Timeline, select a clip item.
Hold down the Option key and drag the clip item to the new location in the Timeline.
You can also make duplicates of sequence clips by dragging them from the Timeline to
the Browser. These copies are affiliate clips that include any changes you’ve made to
the clips in the sequence.