Introduction to DVD Automatic Aspect Ratio Adjustments
When enabled, Zoom Player can react to different DVD Aspect Ratio modes (as specified by the DVD content) by changing various aspects of the player (image position, image blanking, aspect ratio, etc).

There are three types of DVD video content:

1. 4:3 Full Frame
   Full Frame Video that fits the entire viewing area on a non-widescreen 4:3 TV Set.
2. 16:9 Letterbox
   Widescreen Video with the black bars at the top and bottom encoded into the video.
3. 16:9 Anamorphic
   Widescreen Video with 33% extra vertical resolution with parts of the black bars being recreated in software to compensate for the enhanced vertical resolution.

Zoom Player can detect these DVD types and automatically set a Video Position/Size Preset, Blanking Preset, Aspect Ratio Preset and execute an external program each time an aspect ratio change is detected (a single DVD disc can contain multiple content types). This is useful when automating 16:9 Anamorphic displays and other custom conditions.

Zoom Player can apply default values each time a DVD disc is initially played by enabling the 'Auto-set these presets on DVD start' setting.