Canon EOS Rebel T6i EF-S 18-55mm IS STM Lens Kit Instruction Manual - Page 206

Using AF to Focus (AF Method) Selecting the AF Method You can select an AF method to suit the shooting conditions and your subject. The following AF methods are provided: [u(face)+Tracking], [FlexiZone - Multi] (p.208), and [FlexiZone - Single] (p.210). If you want to achieve precise focus, set the lens focus mode switch to , magnify the image, and focus manually (p.216). Select the AF method.  Under the [A] tab, select [AF method].  Select the desired AF method, then press .  While the Live View image is displayed, you can also press the button to select the AF method on the Quick Control screen (p.198). u(face)+Tracking:c The camera detects and focuses on human faces. If a face moves, the AF point also moves to track the face. 1 Display the Live View image.  Press the button.  The Live View image will appear on the LCD monitor. 2 Select an AF point.  When a face is detected, the AF point will appear over the face to be focused on.  If multiple faces are detected, will be displayed. Use the keys to move the frame over the face you want to focus on. 206