Optoma HD65 - Display

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User Controls
Display
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.

16:9: 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.