In the Project panel, click the New Item button and
choose Sequence.
In the New Sequence dialog box, specify the following
options:
Sequence Name
Enter a descriptive name for the sequence.
Video
Type the number of video tracks you want the sequence
to contain, or click the up and down arrows to change the number.
Master
Choose an option from the pop‑up menu to specify whether
you want the Master audio track to be mono, stereo, or 5.1.
For the remaining fields, enter the number of each type
of audio track you want the sequence to contain, or click the up
and down arrow buttons to change each number.