Optoma H27 User Manual - Page 28

User Controls English Management ™ The "Edge Mask" sub menu is supported only when the "Full Screen Zoom" select to "Normal". Keystone (Keystone Correction) Adjust image distortion caused by tilting projector. (±16 degrees) Projection 4 Front-Desktop The factory default setting. 4 Rear-Desktop When you select this function, the projector reverses the image so you may project from behind a translucent screen. 4 Front-Ceiling When you select this function, the projector turns the image upside down to accommodate ceiling-mounted projection. 4 Rear-Ceiling When you select this function, the projector reverses and turns the image upside down at same time. You can display an image from behind a translucent screen with ceiling mounted projection. Signal Type Select signal type RGB or Video surces. Edge Mask Choose "On" to mask off a few pixels on each edge of the image to be displayed. Use Edge Mask "On" if image source happens to have encoding error near any edge of the displayable image. Image Shift Shifts the projected image position vertically. 0 is middle of the screen. You can be stored to preset values by selecting either preset memory 1 or 2 or OFF before adjusting image. 28