Canon EOS 70D Operation Manual - Page 387

8: Custom Controls : AE lock When you press the button assigned to this function, you can lock the exposure (AE lock) during the 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. : FE lock During flash photography, pressing the button assigned to this function will fire a preflash and record the required flash output (FE lock). : Set ISO speed (hold button, turn ) You can set the ISO speed by holding down and turning the dial. If Auto ISO is set, manual ISO speed setting will take effect. Auto ISO cannot be set. If you use this function in the mode, you can adjust the exposure with the ISO speed while maintaining the current shutter speed and aperture. : Shutter speed setting in M mode In manual exposure , you can set the shutter speed with the or dial. : Aperture setting in M mode In manual exposure , you can set the aperture with the or dial. 387