Mitsubishi Electric L423FR Owner's Manual page 59

Available On-Screen Format Sizes, continued
Widescreen Picture (16:9 - HD 1080i/720p only) Example: A True HD Broadcast
Standard (Recommended)
Widescreen Picture (480i/480p)
Standard (Recommended)
Zoom (For letterbox 2.35:1 DVDs)
Stretch Plus
HD Expand (Recommended for 4:3 images with Black Side
Bars)
Expand
Stretch
Narrow
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