An auto-ranging sight includes an optical viewer that includes a reticle within the viewer. The reticle is a liquid crystal display having a plurality of horizontal lines which can individually be selected to be visible. A distance measuring device is provided for measuring distance from the sight to a target. Parameter information is input to a microprocessor to describe the flight of a projectile. The microprocessor also receives the distance information. The microprocessor then determines the required elevation for the optical viewer and attached weapon. It then selects one of the horizontal lines as the visible horizontal cross-hair. The operator then aligns the horizontal and vertical cross-hairs seen through the viewer such that the projectile can be accurately directed to the target. Optionally, a group of liquid crystal display vertical lines can be provided to accommodate windage adjustment for aiming the target. The range determination can be provided by systems using radar, laser, ultrasonic or infrared signals.