Canon EOS-1D C EOS 1D X Instruction Manual - Page 218

Using AF to Focus Quick Mode: f The dedicated AF sensor is used to focus in One-Shot AF mode (p.67), using the same AF method as with viewfinder shooting. Although you can focus the target area quickly, the Live View image will be interrupted momentarily during the AF operation. In AF area selection modes other than 61-point automatic selection AF, you can manually select the AF point or zone. Area AF frame Magnifying frame 1 Display the Live View image. Press the button. X The Live View image will appear on the LCD monitor. If the AF area selection mode is set to "61-point automatic selection AF", the Area AF frame will be displayed. In other modes, the AF point will be displayed as a small frame. The larger rectangular frame is the magnifying frame. 2 Select the AF area selection mode. Press the button. Each time you press the button, the AF area selection mode changes. 218