Apple M3322LL/A User Guide - Page 128

Adjusting convergence Select to show the Convergence menu. Red, green, and blue signals in your display converge to create the colors you see on your screen. If the convergence is not set properly, images or text on your screen may appear blurred, or you may get a "rainbow" effect with several colors forming the edges of images on the screen. If your display is exposed to an external electromagnetic field (for example, from another display or unshielded speakers) over a period of time, you may need to change the convergence to get a clear, distinct screen image. Use the Convergence menu to adjust screen convergence. When convergence is set properly, the image is clear and distinct. Vertical Adjusts the vertical convergence. Press the - button to move the red signal down and the blue signal up. Press the + button to move the red signal up and the blue signal down. Horizontal Adjusts the horizontal convergence. Press the - button to move the red signal to the left and the blue signal to the right. Press the + button to move the red signal to the right and the blue signal to the left. Adjusting the Screen Image 131