ViewSonic A71f User Guide - Page 10

Menu Options Control Explanation Contrast adjusts the difference between the image background (black level) and the foreground (white level). Brightness adjusts the background black level of the screen image. Horizontal Size adjusts width of the screen image. Horizontal Position moves the screen image left or right. Vertical Size adjusts the height of the screen image. Vertical Position moves the screen image up or down. Zoom expands and contracts the entire screen image. Pincushion curves the vertical sides of the screen image. Pin Balance curves the vertical edges of the screen image to the left or right. Trapezoid adjusts the top and bottom of the screen image until they have equal length. Parallelogram slants the vertical edges of the screen image until they are parallel. ViewSonic A71f+ 7