The Create Unified Motion command allows you to create one motion from a script. The entire unified motion is then available when you exit Motion Flow mode.
Create Unified Motion converts a script into a freeform unified motion. The created motion replaces animation present when the Motion Flow Mode button is turned off. This is useful if you want to make changes to the biped like raising its arms or turning its head.
Example: To create a unified motion:
(Motion Flow Mode).
(Show Graph).
(Load File), then open an MFE file.
(Create Unified Motion).
(Motion Flow Mode).
(Create Layer).
A new layer is created and you see a red skeleton appear on your biped.

(Auto Key).
select and rotate the biped's upper left arm about the Y axis.
(Auto Key) and click
(Play Animation).