Optoma H78 User Manual - Page 25
Format, H. Keystone, V. Keystone, Digital Zoom
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English User Controls Display Projection Front Desktop Format 4:3 Vertical Shift 0 H. Keystone 0 V. Keystone 0 Digital zoom 10 DISPLAY Format 4Native: Original image size. 416:9: The standard widescreen display format of the projector. 4Letterbox: Letterbox mode zooms a letterboxed image intended for 4:3 display to full screen wide. Original Input The letterbox 4Window: When a 4:3 image is bigger than a 16:9 screen, select the "Window" mode to fit the image onto the screen without changing the projection distance. Original Input Window H. Keystone Correct image distortion caused by rotating the projector horizontally. V. Keystone Correct image distortion caused by tilting the projector vertically. Digital Zoom Provide different magnification ratios to zoom an image. Images will be centered after zooming. 26