Optoma H31 User Manual - Page 16

User Controls English Brightness 4 Adjust the brightness of the image. Zoom 4 Zoom in or out. Contrast 4 Control the degree of difference between the lightest and darkest parts of the picture. Keystone +/- 4 Correct image distortion caused by tilting the projector. 4 : 3 4 Scale the image at a 4:3 aspect ratio. 16 : 9 4 Scale the image at a 16:9 aspect ratio. Letterbox 4 Enable the viewing of the letterboxed non-anamorphically enhanced movie at full screen width. Part of the original image will be lost if the image aspect ratio is less than 1.78:1. Image shift 4 Shifts the projected image position vertically. Four Directional Select Keys 4 Press "Menu", then use to select menu items or to make adjustments to your selection. Enter 4 Confirm your selection. Menu/Exit 4 Display or exits the onscreen display menu. DVI-A 4 Choose DVI-Analog source. DVI-D 4 Choose DVI-Digital source. Composite 4 Choose video source. S-Video 4 Choose S-Video source. Component 4 Choose Component-i and Component-p sources. 16