Canon EOS 7D Mark II Advanced Owners Manual - Page 454

83: Custom ControlsN : Metering start When you press the shutter button halfway, only the exposure metering is performed. : AE lock When you press the button assigned to this function, you can lock the exposure (AE lock) during metering. Convenient when you want to focus and meter the shot at different areas or when you want to take multiple shots at the same exposure setting. : AE lock (while button pressed) The exposure will be locked (AE lock) while you press the shutter button. : AE lock (hold) When you press the button assigned to this function, you can lock the exposure (AE lock). The AE lock will be maintained until you press the button again. Convenient when you want to focus and meter the shot at different areas or when you want to take multiple shots at the same exposure setting. : AE lock, AF stop When you press the button assigned to this function, you can lock the exposure (AE lock) and the AF will stop. Convenient during AI Servo AF if you want AE lock at the same time when AF stops. : FE lock During flash photography, pressing the button assigned to this function will fire a preflash and record the required flash output (FE lock). If you assign [AE lock (while button pressed)] to the shutter button, any buttons assigned to [AE lock] or [AE lock (hold)] will also work as [AE lock (while button pressed)]. 454