Apple Final Cut Pro 7 - Manual (Page 795)

7 In the Current Timecode field, enter the timecode number where you want to place the
beginning of the copied clip or clips.
8 Choose Edit > Paste (or press Command-V).
The copied clips are pasted into the second sequence.
Important: If you copy and paste clips between sequences in different projects, the
master-affiliate relationships are maintained in the projects. Master clips are also pasted
into the project and can be revealed. You cannot reveal master clips between projects,
nor match frames to master clips between projects.
Nesting Sequences
Final Cut Pro allows you to treat sequences as clips. You can open sequences in the Viewer
and set In and Out points, and you can even edit sequences into other sequences. Putting
one sequence inside another is called nesting a sequence. The sequence inside another
sequence is the nested sequence. The sequence that contains the nested sequence is
sometimes called the parent sequence.
795 Chapter 49 Sequence-to-Sequence Editing