Mitsubishi WS-A48 Owner's Manual page 65

Part IV: Operation
For the 16:9 Models
Note the difference between the appearanceof figures in Non-Anamorphic (Le_) and Anamorphic Widescreen(Right) pictures
Normal Broadcast Picture (4:3 - 480i1480p) Widescreen Picture (16:9 - 480i1480p)
For Example: NON-ANAMORPHIC DVDs For Example: ANAMORPHIC DVDs
Standard (Not Recommended)
Standard (Recommended)
Expand (Recommended for Letterbox)
Expand (Not Recommended)
Zoom (Not Recommended)
Zoom (Recommended for 2.35:1 DVDs)
Stretched (Recommended for Standard Broadcast) Stretched (Not Recommended)
Narrow (Recommended for Occasional Use) Narrow (Not Recommended)