Apple Soundtrack Pro 3 - Manual (Page 111)

Video Out Preferences
These preferences let you specify settings for video output from Soundtrack Pro.
• Video Output Device pop-up menu: Choose a video output device, or choose None.
• Use Quarter-size Frames checkbox: Select to send video to the output device as
quarter-size frames. Quarter-size frames require less data throughput and can be sent
more efficiently than full-size frames.
111 Chapter 4 Soundtrack Pro Preferences