Canon EOS Rebel T6s EF-S 18-135mm IS STM Lens Kit Instruction Manual - Page 139

Using AF to Focus (AF Method) 2 Select the AF point.J  Pressing or the button will toggle between automatic selection and zone selection. In Basic Zone modes, automatic selection is set automatically.  Use the or keys to select a zone. To return to the center zone, press or the button again.  You can also tap on the LCD monitor screen to select a zone. When a zone is selected, tap [n] on the screen to switch to automatic selection. 3 Focus on the subject.  Aim the AF point over the subject and press the shutter button halfway.  When focus is achieved, the AF point will turn green and the beeper will sound.  If focus is not achieved, the area frame will turn orange. 4 Take the picture.  Check the focus and exposure, then press the shutter button completely to take the picture (p.132). 139