Optoma EH503 - Manual (Page 40)

English 40
Display
Format
Use this function to choose your desired aspect ratio.
4 4:3: This format is for 4x3 input sources not enhanced for Wide screen TV.
4 16:9 (XGA) | 16:10 (WXGA/WUXGA): This format is for 16x9 input
sources, like HDTV and DVD enhanced for Wide screen TV.
4 LBX: This format is for non-16x9, letterbox source and for users who
use an external 16x9 lens to display 2.35:1 aspect ratio using full
resolution.
4 Native: Depends on the resolution of the input source – No scaling is
performed.
4 Auto: Automatically selects the appropriate format.
XGA WXGA/WUXGA
User Controls