Optoma EW1610 User's Manual - Page 29

User Controls Display  Tow screen type 16:10 and 16:9. When choose 16:9, then the format is 4:3, 16:9, LBX, Native, AUTO. When screen type mode is 16:10 then the format should be 4:3, 16:10, LBX, Native, AUTO. (See page 35) Format Use this function to choose your desired aspect ratio.  4:3: This format is for 4x3 input sources not enhanced for Wide screen TV.  16:10: This format is for 16x10 input sources, like HDTV and DVD enhanced for Wide screen TV.  16:9: This format is for 16x9 input sources, like HDTV and DVD enhanced for Wide screen TV.  LBX: This format is for non-16x9, letterbox source and for users who use external 16x9 lens to display 2.35:1 aspect ratio using full resolution.  Native: This format displays the original image without any scaling.  AUTO: If Auto format is select, screen type will automatically become 16:10. Aspect ratio (source detected) 4:3 16:9 15:9 16:10 Resize image 1066 x 800 1280 x 720 1280 x768 1280 x 800 29 English