Using 16:9 Assets in Tracks
Each track within a DVD Studio Pro project has an aspect ratio setting. This setting lets
the DVD player know how to display the video when playing back the title.
With a 16:9 track, you specify how it will play back on a 4:3 monitor: Pan-Scan, Letterbox,
or Pan Scan & Letterbox (allowing the viewer to choose). As mentioned previously,
pan-scan is rarely used and should never be selected unless the encoded video contains
pan-scan vector information.